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Pystats results

  • benchmark: json_loads
  • fork: python
  • ref: cf4c4ecc26c7e3b89f2e56893260a8a3319dab3d
  • commit hash: cf4c4ec
  • commit date: 2025-02-01T18:49:45+02:00

Execution counts

Execution counts for Tier 1 instructions.

The "miss ratio" column shows the percentage of times the instruction executed that it deoptimized. When this happens, the base unspecialized instruction is not counted.

Name Count Self Cumulative Miss ratio
LOAD_FAST 16,620,900 22.4% 22.4%
POP_JUMP_IF_NOT_NONE 5,529,660 7.5% 29.8%
LOAD_FAST_LOAD_FAST 3,686,700 5.0% 34.8%
PUSH_NULL 2,780,580 3.7% 38.6%
RETURN_VALUE 2,780,520 3.7% 42.3%
RESUME_CHECK 2,780,520 3.7% 46.1%
CALL_NON_PY_GENERAL 2,780,460 3.7% 49.8%
POP_JUMP_IF_FALSE 2,764,920 3.7% 53.5%
LOAD_ATTR_METHOD_NO_DICT 2,764,920 3.7% 57.3%
LOAD_GLOBAL_BUILTIN 2,764,860 3.7% 61.0%
CALL_METHOD_DESCRIPTOR_FAST 2,764,800 3.7% 64.7%
LOAD_GLOBAL_MODULE 1,843,440 2.5% 67.2%
LOAD_ATTR_METHOD_WITH_VALUES 1,843,320 2.5% 69.7%
LOAD_CONST_MORTAL 1,843,320 2.5% 72.2%
STORE_FAST_STORE_FAST 1,843,260 2.5% 74.6%
CALL_PY_GENERAL 1,843,260 2.5% 77.1%
TO_BOOL_BOOL 1,843,260 2.5% 79.6%
UNPACK_SEQUENCE_TWO_TUPLE 1,843,260 2.5% 82.1%
STORE_FAST 983,880 1.3% 83.4%
POP_TOP 937,260 1.3% 84.7%
TO_BOOL 921,940 1.2% 85.9%
LOAD_ATTR_INSTANCE_VALUE 921,840 1.2% 87.2%
LOAD_ATTR_MODULE 921,780 1.2% 88.4%
BUILD_TUPLE 921,720 1.2% 89.6%
LOAD_SMALL_INT 921,720 1.2% 90.9%
NOP 921,660 1.2% 92.1%
JUMP_FORWARD 921,660 1.2% 93.4%
POP_JUMP_IF_TRUE 921,660 1.2% 94.6%
COMPARE_OP_INT 921,660 1.2% 95.9%
CALL_ISINSTANCE 921,600 1.2% 97.1%
CALL_KW_PY 921,600 1.2% 98.3%
CALL_LEN 921,600 1.2% 99.6%
EXTENDED_ARG 107,520 0.1% 99.7%
JUMP_BACKWARD_NO_JIT 61,500 0.1% 99.8%
FOR_ITER_TUPLE 61,440 0.1% 99.9%
LOAD_CONST_IMMORTAL 15,960 0.0% 99.9%
POP_ITER 15,480 0.0% 99.9%
GET_ITER 15,420 0.0% 100.0%
FOR_ITER_RANGE 15,420 0.0% 100.0%
INTERPRETER_EXIT 15,360 0.0% 100.0%
LOAD_ATTR 280 0.0% 100.0%
CALL 260 0.0% 100.0%
CALL_PY_EXACT_ARGS 240 0.0% 100.0%
LOAD_GLOBAL 100 0.0% 100.0%
CALL_FUNCTION_EX 60 0.0% 100.0%
MAKE_FUNCTION 60 0.0% 100.0%
COPY_FREE_VARS 60 0.0% 100.0%
FOR_ITER 60 0.0% 100.0%
IS_OP 60 0.0% 100.0%
LOAD_DEREF 60 0.0% 100.0%
MAKE_CELL 60 0.0% 100.0%
SET_FUNCTION_ATTRIBUTE 60 0.0% 100.0%
STORE_DEREF 60 0.0% 100.0%
BINARY_OP_SUBTRACT_FLOAT 60 0.0% 100.0%
BINARY_SUBSCR_TUPLE_INT 60 0.0% 100.0%
CALL_BUILTIN_CLASS 60 0.0% 100.0%
CALL_METHOD_DESCRIPTOR_NOARGS 60 0.0% 100.0%
CALL_METHOD_DESCRIPTOR_O 60 0.0% 100.0%
BINARY_SUBSCR 20 0.0% 100.0%
BINARY_OP 20 0.0% 100.0%
COMPARE_OP 20 0.0% 100.0%
UNPACK_SEQUENCE 20 0.0% 100.0%

Pair counts

Pair counts for top 100 opcode pairs

Pairs of specialized operations that deoptimize and are then followed by the corresponding unspecialized instruction are not counted as pairs.

Pair Count Self Cumulative
LOAD_FAST POP_JUMP_IF_NOT_NONE 5,529,660 7.5% 7.5%
POP_JUMP_IF_NOT_NONE LOAD_FAST 5,529,600 7.5% 14.9%
PUSH_NULL LOAD_FAST 1,843,260 2.5% 17.4%
POP_JUMP_IF_FALSE LOAD_FAST 1,843,260 2.5% 19.9%
LOAD_GLOBAL_BUILTIN LOAD_FAST 1,843,260 2.5% 22.4%
UNPACK_SEQUENCE_TWO_TUPLE STORE_FAST_STORE_FAST 1,843,260 2.5% 24.8%
LOAD_FAST_LOAD_FAST CALL_NON_PY_GENERAL 1,843,240 2.5% 27.3%
LOAD_FAST CALL_PY_GENERAL 1,843,200 2.5% 29.8%
LOAD_FAST LOAD_GLOBAL_BUILTIN 1,843,200 2.5% 32.3%
CALL_NON_PY_GENERAL LOAD_ATTR_METHOD_NO_DICT 1,843,200 2.5% 34.8%
CALL_PY_GENERAL RESUME_CHECK 1,843,200 2.5% 37.3%
LOAD_ATTR_METHOD_NO_DICT CALL_METHOD_DESCRIPTOR_FAST 1,843,200 2.5% 39.7%
TO_BOOL_BOOL POP_JUMP_IF_FALSE 1,843,200 2.5% 42.2%
STORE_FAST LOAD_FAST 937,440 1.3% 43.5%
LOAD_FAST PUSH_NULL 937,260 1.3% 44.7%
RESUME_CHECK LOAD_FAST 937,140 1.3% 46.0%
RETURN_VALUE POP_TOP 921,780 1.2% 47.3%
LOAD_FAST LOAD_ATTR_INSTANCE_VALUE 921,740 1.2% 48.5%
LOAD_FAST RETURN_VALUE 921,720 1.2% 49.7%
LOAD_FAST LOAD_SMALL_INT 921,720 1.2% 51.0%
LOAD_ATTR_MODULE PUSH_NULL 921,720 1.2% 52.2%
LOAD_GLOBAL_MODULE LOAD_ATTR_MODULE 921,720 1.2% 53.5%
LOAD_FAST LOAD_ATTR_METHOD_WITH_VALUES 921,680 1.2% 54.7%
NOP LOAD_FAST 921,660 1.2% 55.9%
PUSH_NULL LOAD_FAST_LOAD_FAST 921,660 1.2% 57.2%
JUMP_FORWARD LOAD_FAST 921,660 1.2% 58.4%
LOAD_FAST_LOAD_FAST BUILD_TUPLE 921,660 1.2% 59.7%
STORE_FAST_STORE_FAST LOAD_FAST 921,660 1.2% 60.9%
COMPARE_OP_INT POP_JUMP_IF_FALSE 921,660 1.2% 62.2%
LOAD_ATTR_METHOD_WITH_VALUES LOAD_FAST 921,660 1.2% 63.4%
LOAD_ATTR_METHOD_WITH_VALUES LOAD_FAST_LOAD_FAST 921,660 1.2% 64.6%
LOAD_FAST TO_BOOL 921,620 1.2% 65.9%
RETURN_VALUE RETURN_VALUE 921,600 1.2% 67.1%
RETURN_VALUE UNPACK_SEQUENCE_TWO_TUPLE 921,600 1.2% 68.4%
TO_BOOL POP_JUMP_IF_TRUE 921,600 1.2% 69.6%
BUILD_TUPLE RETURN_VALUE 921,600 1.2% 70.8%
LOAD_FAST CALL_LEN 921,600 1.2% 72.1%
LOAD_FAST LOAD_ATTR_METHOD_NO_DICT 921,600 1.2% 73.3%
LOAD_FAST_LOAD_FAST PUSH_NULL 921,600 1.2% 74.6%
LOAD_SMALL_INT CALL_NON_PY_GENERAL 921,600 1.2% 75.8%
POP_JUMP_IF_FALSE JUMP_FORWARD 921,600 1.2% 77.1%
POP_JUMP_IF_TRUE LOAD_GLOBAL_MODULE 921,600 1.2% 78.3%
STORE_FAST_STORE_FAST LOAD_FAST_LOAD_FAST 921,600 1.2% 79.5%
CALL_ISINSTANCE TO_BOOL_BOOL 921,600 1.2% 80.8%
CALL_KW_PY RESUME_CHECK 921,600 1.2% 82.0%
CALL_LEN COMPARE_OP_INT 921,600 1.2% 83.3%
CALL_METHOD_DESCRIPTOR_FAST STORE_FAST 921,600 1.2% 84.5%
CALL_METHOD_DESCRIPTOR_FAST LOAD_CONST_MORTAL 921,600 1.2% 85.8%
CALL_METHOD_DESCRIPTOR_FAST TO_BOOL_BOOL 921,600 1.2% 87.0%
CALL_NON_PY_GENERAL UNPACK_SEQUENCE_TWO_TUPLE 921,600 1.2% 88.2%
LOAD_ATTR_INSTANCE_VALUE LOAD_FAST_LOAD_FAST 921,600 1.2% 89.5%
LOAD_ATTR_METHOD_NO_DICT LOAD_CONST_MORTAL 921,600 1.2% 90.7%
LOAD_CONST_MORTAL CALL_KW_PY 921,600 1.2% 92.0%
LOAD_CONST_MORTAL CALL_METHOD_DESCRIPTOR_FAST 921,600 1.2% 93.2%
LOAD_GLOBAL_BUILTIN CALL_ISINSTANCE 921,600 1.2% 94.4%
LOAD_GLOBAL_MODULE LOAD_ATTR_METHOD_WITH_VALUES 921,600 1.2% 95.7%
RESUME_CHECK NOP 921,600 1.2% 96.9%
RESUME_CHECK LOAD_GLOBAL_BUILTIN 921,600 1.2% 98.2%
POP_TOP LOAD_GLOBAL_MODULE 875,520 1.2% 99.3%
EXTENDED_ARG FOR_ITER_TUPLE 61,440 0.1% 99.4%
STORE_FAST LOAD_GLOBAL_MODULE 46,120 0.1% 99.5%
POP_TOP EXTENDED_ARG 46,080 0.1% 99.6%
EXTENDED_ARG JUMP_BACKWARD_NO_JIT 46,080 0.1% 99.6%
FOR_ITER_TUPLE STORE_FAST 46,080 0.1% 99.7%
JUMP_BACKWARD_NO_JIT EXTENDED_ARG 46,080 0.1% 99.7%
LOAD_CONST_IMMORTAL RETURN_VALUE 15,540 0.0% 99.8%
PUSH_NULL CALL_NON_PY_GENERAL 15,520 0.0% 99.8%
CACHE RESUME_CHECK 15,420 0.0% 99.8%
POP_TOP JUMP_BACKWARD_NO_JIT 15,420 0.0% 99.8%
LOAD_FAST GET_ITER 15,420 0.0% 99.8%
CALL_NON_PY_GENERAL POP_TOP 15,420 0.0% 99.9%
GET_ITER EXTENDED_ARG 15,360 0.0% 99.9%
POP_ITER LOAD_CONST_IMMORTAL 15,360 0.0% 99.9%
RETURN_VALUE INTERPRETER_EXIT 15,360 0.0% 99.9%
FOR_ITER_RANGE STORE_FAST 15,360 0.0% 100.0%
FOR_ITER_TUPLE POP_ITER 15,360 0.0% 100.0%
JUMP_BACKWARD_NO_JIT FOR_ITER_RANGE 15,360 0.0% 100.0%
TO_BOOL TO_BOOL 260 0.0% 100.0%
POP_TOP LOAD_CONST_IMMORTAL 180 0.0% 100.0%
RETURN_VALUE STORE_FAST 180 0.0% 100.0%
STORE_FAST LOAD_CONST_IMMORTAL 180 0.0% 100.0%
CALL_PY_EXACT_ARGS RESUME_CHECK 180 0.0% 100.0%
LOAD_FAST LOAD_ATTR 140 0.0% 100.0%
POP_ITER LOAD_FAST 120 0.0% 100.0%
LOAD_FAST LOAD_CONST_IMMORTAL 120 0.0% 100.0%
LOAD_CONST_IMMORTAL STORE_FAST 120 0.0% 100.0%
LOAD_CONST_IMMORTAL LOAD_CONST_IMMORTAL 120 0.0% 100.0%
RESUME_CHECK LOAD_GLOBAL_MODULE 120 0.0% 100.0%
CALL CALL_NON_PY_GENERAL 100 0.0% 100.0%
PUSH_NULL CALL 80 0.0% 100.0%
CALL CALL_PY_EXACT_ARGS 80 0.0% 100.0%
LOAD_FAST_LOAD_FAST CALL_PY_EXACT_ARGS 80 0.0% 100.0%
LOAD_GLOBAL LOAD_GLOBAL_MODULE 80 0.0% 100.0%
LOAD_ATTR_INSTANCE_VALUE LOAD_ATTR_METHOD_NO_DICT 80 0.0% 100.0%
GET_ITER FOR_ITER_RANGE 60 0.0% 100.0%
MAKE_FUNCTION SET_FUNCTION_ATTRIBUTE 60 0.0% 100.0%
POP_TOP LOAD_FAST 60 0.0% 100.0%
PUSH_NULL CALL_FUNCTION_EX 60 0.0% 100.0%
TO_BOOL POP_JUMP_IF_FALSE 60 0.0% 100.0%
BUILD_TUPLE LOAD_CONST_MORTAL 60 0.0% 100.0%

Predecessor/Successor Pairs

Top 5 predecessors and successors of each Tier 1 opcode.

This does not include the unspecialized instructions that occur after a specialized instruction deoptimizes.

CACHE

Successors and predecessors for CACHE
Successors Count Percentage
RESUME_CHECK 15,420 100.0%

BINARY_SUBSCR

Successors and predecessors for BINARY_SUBSCR
Predecessors Count Percentage
LOAD_SMALL_INT 20 100.0%
Successors Count Percentage
BINARY_SUBSCR_TUPLE_INT 20 100.0%

CALL_FUNCTION_EX

Successors and predecessors for CALL_FUNCTION_EX
Predecessors Count Percentage
PUSH_NULL 60 100.0%

GET_ITER

Successors and predecessors for GET_ITER
Predecessors Count Percentage
LOAD_FAST 15,420 100.0%
Successors Count Percentage
EXTENDED_ARG 15,360 99.6%
FOR_ITER_RANGE 60 0.4%

INTERPRETER_EXIT

Successors and predecessors for INTERPRETER_EXIT
Predecessors Count Percentage
RETURN_VALUE 15,360 100.0%

MAKE_FUNCTION

Successors and predecessors for MAKE_FUNCTION
Predecessors Count Percentage
LOAD_CONST_MORTAL 60 100.0%
Successors Count Percentage
SET_FUNCTION_ATTRIBUTE 60 100.0%

NOP

Successors and predecessors for NOP
Predecessors Count Percentage
RESUME_CHECK 921,600 100.0%
POP_JUMP_IF_TRUE 60 0.0%
Successors Count Percentage
LOAD_FAST 921,660 100.0%

POP_ITER

Successors and predecessors for POP_ITER
Predecessors Count Percentage
FOR_ITER_TUPLE 15,360 99.2%
FOR_ITER 60 0.4%
FOR_ITER_RANGE 60 0.4%
Successors Count Percentage
LOAD_CONST_IMMORTAL 15,360 99.2%
LOAD_FAST 120 0.8%

POP_TOP

Successors and predecessors for POP_TOP
Predecessors Count Percentage
RETURN_VALUE 921,780 98.3%
CALL_NON_PY_GENERAL 15,420 1.6%
CALL_METHOD_DESCRIPTOR_O 60 0.0%
Successors Count Percentage
LOAD_GLOBAL_MODULE 875,520 93.4%
EXTENDED_ARG 46,080 4.9%
JUMP_BACKWARD_NO_JIT 15,420 1.6%
LOAD_CONST_IMMORTAL 180 0.0%
LOAD_FAST 60 0.0%

PUSH_NULL

Successors and predecessors for PUSH_NULL
Predecessors Count Percentage
LOAD_FAST 937,260 33.7%
LOAD_ATTR_MODULE 921,720 33.1%
LOAD_FAST_LOAD_FAST 921,600 33.1%
Successors Count Percentage
LOAD_FAST 1,843,260 66.3%
LOAD_FAST_LOAD_FAST 921,660 33.1%
CALL_NON_PY_GENERAL 15,520 0.6%
CALL 80 0.0%
CALL_FUNCTION_EX 60 0.0%

RETURN_VALUE

Successors and predecessors for RETURN_VALUE
Predecessors Count Percentage
LOAD_FAST 921,720 33.1%
RETURN_VALUE 921,600 33.1%
BUILD_TUPLE 921,600 33.1%
LOAD_CONST_IMMORTAL 15,540 0.6%
CALL_NON_PY_GENERAL 60 0.0%
Successors Count Percentage
POP_TOP 921,780 33.2%
RETURN_VALUE 921,600 33.1%
UNPACK_SEQUENCE_TWO_TUPLE 921,600 33.1%
INTERPRETER_EXIT 15,360 0.6%
STORE_FAST 180 0.0%

TO_BOOL

Successors and predecessors for TO_BOOL
Predecessors Count Percentage
LOAD_FAST 921,620 100.0%
TO_BOOL 260 0.0%
LOAD_ATTR_INSTANCE_VALUE 60 0.0%
Successors Count Percentage
POP_JUMP_IF_TRUE 921,600 100.0%
TO_BOOL 260 0.0%
POP_JUMP_IF_FALSE 60 0.0%
TO_BOOL_BOOL 20 0.0%

BINARY_OP

Successors and predecessors for BINARY_OP
Predecessors Count Percentage
LOAD_FAST 20 100.0%
Successors Count Percentage
BINARY_OP_SUBTRACT_FLOAT 20 100.0%

BUILD_TUPLE

Successors and predecessors for BUILD_TUPLE
Predecessors Count Percentage
LOAD_FAST_LOAD_FAST 921,660 100.0%
LOAD_FAST 60 0.0%
Successors Count Percentage
RETURN_VALUE 921,600 100.0%
LOAD_CONST_MORTAL 60 0.0%
CALL_METHOD_DESCRIPTOR_O 40 0.0%
CALL 20 0.0%

CALL

Successors and predecessors for CALL
Predecessors Count Percentage
PUSH_NULL 80 30.8%
LOAD_FAST_LOAD_FAST 60 23.1%
LOAD_CONST_IMMORTAL 40 15.4%
BUILD_TUPLE 20 7.7%
LOAD_FAST 20 7.7%
Successors Count Percentage
CALL_NON_PY_GENERAL 100 38.5%
CALL_PY_EXACT_ARGS 80 30.8%
CALL_BUILTIN_CLASS 20 7.7%
CALL_METHOD_DESCRIPTOR_NOARGS 20 7.7%
CALL_METHOD_DESCRIPTOR_O 20 7.7%

COMPARE_OP

Successors and predecessors for COMPARE_OP
Predecessors Count Percentage
LOAD_SMALL_INT 20 100.0%
Successors Count Percentage
COMPARE_OP_INT 20 100.0%

COPY_FREE_VARS

Successors and predecessors for COPY_FREE_VARS
Predecessors Count Percentage
CALL_PY_EXACT_ARGS 60 100.0%
Successors Count Percentage
RESUME_CHECK 60 100.0%

EXTENDED_ARG

Successors and predecessors for EXTENDED_ARG
Predecessors Count Percentage
POP_TOP 46,080 42.9%
JUMP_BACKWARD_NO_JIT 46,080 42.9%
GET_ITER 15,360 14.3%
Successors Count Percentage
FOR_ITER_TUPLE 61,440 57.1%
JUMP_BACKWARD_NO_JIT 46,080 42.9%

FOR_ITER

Successors and predecessors for FOR_ITER
Predecessors Count Percentage
JUMP_BACKWARD_NO_JIT 60 100.0%
Successors Count Percentage
POP_ITER 60 100.0%

IS_OP

Successors and predecessors for IS_OP
Predecessors Count Percentage
LOAD_CONST_IMMORTAL 60 100.0%
Successors Count Percentage
STORE_FAST 60 100.0%

JUMP_FORWARD

Successors and predecessors for JUMP_FORWARD
Predecessors Count Percentage
POP_JUMP_IF_FALSE 921,600 100.0%
STORE_FAST 60 0.0%
Successors Count Percentage
LOAD_FAST 921,660 100.0%

LOAD_ATTR

Successors and predecessors for LOAD_ATTR
Predecessors Count Percentage
LOAD_FAST 140 50.0%
LOAD_GLOBAL_MODULE 60 21.4%
LOAD_ATTR_INSTANCE_VALUE 40 14.3%
LOAD_ATTR 20 7.1%
LOAD_FAST_LOAD_FAST 20 7.1%
Successors Count Percentage
LOAD_FAST_LOAD_FAST 60 21.4%
LOAD_ATTR_INSTANCE_VALUE 60 21.4%
LOAD_ATTR_MODULE 60 21.4%
LOAD_ATTR_METHOD_NO_DICT 40 14.3%
LOAD_ATTR_METHOD_WITH_VALUES 40 14.3%

LOAD_DEREF

Successors and predecessors for LOAD_DEREF
Predecessors Count Percentage
STORE_FAST 60 100.0%
Successors Count Percentage
STORE_FAST 60 100.0%

LOAD_FAST

Successors and predecessors for LOAD_FAST
Predecessors Count Percentage
POP_JUMP_IF_NOT_NONE 5,529,600 33.3%
PUSH_NULL 1,843,260 11.1%
POP_JUMP_IF_FALSE 1,843,260 11.1%
LOAD_GLOBAL_BUILTIN 1,843,260 11.1%
STORE_FAST 937,440 5.6%
Successors Count Percentage
POP_JUMP_IF_NOT_NONE 5,529,660 33.3%
CALL_PY_GENERAL 1,843,200 11.1%
LOAD_GLOBAL_BUILTIN 1,843,200 11.1%
PUSH_NULL 937,260 5.6%
LOAD_ATTR_INSTANCE_VALUE 921,740 5.5%

LOAD_FAST_LOAD_FAST

Successors and predecessors for LOAD_FAST_LOAD_FAST
Predecessors Count Percentage
PUSH_NULL 921,660 25.0%
LOAD_ATTR_METHOD_WITH_VALUES 921,660 25.0%
STORE_FAST_STORE_FAST 921,600 25.0%
LOAD_ATTR_INSTANCE_VALUE 921,600 25.0%
LOAD_ATTR 60 0.0%
Successors Count Percentage
CALL_NON_PY_GENERAL 1,843,240 50.0%
BUILD_TUPLE 921,660 25.0%
PUSH_NULL 921,600 25.0%
CALL_PY_EXACT_ARGS 80 0.0%
CALL 60 0.0%

LOAD_GLOBAL

Successors and predecessors for LOAD_GLOBAL
Predecessors Count Percentage
RESUME_CHECK 60 60.0%
POP_JUMP_IF_FALSE 20 20.0%
STORE_FAST 20 20.0%
Successors Count Percentage
LOAD_GLOBAL_MODULE 80 80.0%
LOAD_GLOBAL_BUILTIN 20 20.0%

LOAD_SMALL_INT

Successors and predecessors for LOAD_SMALL_INT
Predecessors Count Percentage
LOAD_FAST 921,720 100.0%
Successors Count Percentage
CALL_NON_PY_GENERAL 921,600 100.0%
BINARY_SUBSCR_TUPLE_INT 40 0.0%
COMPARE_OP_INT 40 0.0%
BINARY_SUBSCR 20 0.0%
COMPARE_OP 20 0.0%

MAKE_CELL

Successors and predecessors for MAKE_CELL
Predecessors Count Percentage
CALL_PY_GENERAL 60 100.0%
Successors Count Percentage
RESUME_CHECK 60 100.0%

POP_JUMP_IF_FALSE

Successors and predecessors for POP_JUMP_IF_FALSE
Predecessors Count Percentage
TO_BOOL_BOOL 1,843,200 66.7%
COMPARE_OP_INT 921,660 33.3%
TO_BOOL 60 0.0%
Successors Count Percentage
LOAD_FAST 1,843,260 66.7%
JUMP_FORWARD 921,600 33.3%
LOAD_GLOBAL_BUILTIN 40 0.0%
LOAD_GLOBAL 20 0.0%

POP_JUMP_IF_NOT_NONE

Successors and predecessors for POP_JUMP_IF_NOT_NONE
Predecessors Count Percentage
LOAD_FAST 5,529,660 100.0%
Successors Count Percentage
LOAD_FAST 5,529,600 100.0%
LOAD_CONST_MORTAL 60 0.0%

POP_JUMP_IF_TRUE

Successors and predecessors for POP_JUMP_IF_TRUE
Predecessors Count Percentage
TO_BOOL 921,600 100.0%
TO_BOOL_BOOL 60 0.0%
Successors Count Percentage
LOAD_GLOBAL_MODULE 921,600 100.0%
NOP 60 0.0%

SET_FUNCTION_ATTRIBUTE

Successors and predecessors for SET_FUNCTION_ATTRIBUTE
Predecessors Count Percentage
MAKE_FUNCTION 60 100.0%
Successors Count Percentage
STORE_FAST 60 100.0%

STORE_DEREF

Successors and predecessors for STORE_DEREF
Predecessors Count Percentage
CALL_NON_PY_GENERAL 60 100.0%
Successors Count Percentage
LOAD_FAST 60 100.0%

STORE_FAST

Successors and predecessors for STORE_FAST
Predecessors Count Percentage
CALL_METHOD_DESCRIPTOR_FAST 921,600 93.7%
FOR_ITER_TUPLE 46,080 4.7%
FOR_ITER_RANGE 15,360 1.6%
RETURN_VALUE 180 0.0%
LOAD_CONST_IMMORTAL 120 0.0%
Successors Count Percentage
LOAD_FAST 937,440 95.3%
LOAD_GLOBAL_MODULE 46,120 4.7%
LOAD_CONST_IMMORTAL 180 0.0%
JUMP_FORWARD 60 0.0%
LOAD_DEREF 60 0.0%

STORE_FAST_STORE_FAST

Successors and predecessors for STORE_FAST_STORE_FAST
Predecessors Count Percentage
UNPACK_SEQUENCE_TWO_TUPLE 1,843,260 100.0%
Successors Count Percentage
LOAD_FAST 921,660 50.0%
LOAD_FAST_LOAD_FAST 921,600 50.0%

UNPACK_SEQUENCE

Successors and predecessors for UNPACK_SEQUENCE
Predecessors Count Percentage
CALL_METHOD_DESCRIPTOR_NOARGS 20 100.0%
Successors Count Percentage
UNPACK_SEQUENCE_TWO_TUPLE 20 100.0%

BINARY_OP_SUBTRACT_FLOAT

Successors and predecessors for BINARY_OP_SUBTRACT_FLOAT
Predecessors Count Percentage
LOAD_FAST 40 66.7%
BINARY_OP 20 33.3%
Successors Count Percentage
STORE_FAST 60 100.0%

BINARY_SUBSCR_TUPLE_INT

Successors and predecessors for BINARY_SUBSCR_TUPLE_INT
Predecessors Count Percentage
LOAD_SMALL_INT 40 66.7%
BINARY_SUBSCR 20 33.3%
Successors Count Percentage
STORE_FAST 60 100.0%

CALL_BUILTIN_CLASS

Successors and predecessors for CALL_BUILTIN_CLASS
Predecessors Count Percentage
LOAD_FAST 40 66.7%
CALL 20 33.3%
Successors Count Percentage
STORE_FAST 60 100.0%

CALL_ISINSTANCE

Successors and predecessors for CALL_ISINSTANCE
Predecessors Count Percentage
LOAD_GLOBAL_BUILTIN 921,600 100.0%
Successors Count Percentage
TO_BOOL_BOOL 921,600 100.0%

CALL_KW_PY

Successors and predecessors for CALL_KW_PY
Predecessors Count Percentage
LOAD_CONST_MORTAL 921,600 100.0%
Successors Count Percentage
RESUME_CHECK 921,600 100.0%

CALL_LEN

Successors and predecessors for CALL_LEN
Predecessors Count Percentage
LOAD_FAST 921,600 100.0%
Successors Count Percentage
COMPARE_OP_INT 921,600 100.0%

CALL_METHOD_DESCRIPTOR_FAST

Successors and predecessors for CALL_METHOD_DESCRIPTOR_FAST
Predecessors Count Percentage
LOAD_ATTR_METHOD_NO_DICT 1,843,200 66.7%
LOAD_CONST_MORTAL 921,600 33.3%
Successors Count Percentage
STORE_FAST 921,600 33.3%
LOAD_CONST_MORTAL 921,600 33.3%
TO_BOOL_BOOL 921,600 33.3%

CALL_METHOD_DESCRIPTOR_NOARGS

Successors and predecessors for CALL_METHOD_DESCRIPTOR_NOARGS
Predecessors Count Percentage
LOAD_ATTR_METHOD_NO_DICT 40 66.7%
CALL 20 33.3%
Successors Count Percentage
UNPACK_SEQUENCE_TWO_TUPLE 40 66.7%
UNPACK_SEQUENCE 20 33.3%

CALL_METHOD_DESCRIPTOR_O

Successors and predecessors for CALL_METHOD_DESCRIPTOR_O
Predecessors Count Percentage
BUILD_TUPLE 40 66.7%
CALL 20 33.3%
Successors Count Percentage
POP_TOP 60 100.0%

CALL_NON_PY_GENERAL

Successors and predecessors for CALL_NON_PY_GENERAL
Predecessors Count Percentage
LOAD_FAST_LOAD_FAST 1,843,240 66.3%
LOAD_SMALL_INT 921,600 33.1%
PUSH_NULL 15,520 0.6%
CALL 100 0.0%
Successors Count Percentage
LOAD_ATTR_METHOD_NO_DICT 1,843,200 66.3%
UNPACK_SEQUENCE_TWO_TUPLE 921,600 33.1%
POP_TOP 15,420 0.6%
RETURN_VALUE 60 0.0%
LOAD_FAST 60 0.0%

CALL_PY_EXACT_ARGS

Successors and predecessors for CALL_PY_EXACT_ARGS
Predecessors Count Percentage
CALL 80 33.3%
LOAD_FAST_LOAD_FAST 80 33.3%
LOAD_ATTR_INSTANCE_VALUE 40 16.7%
LOAD_CONST_IMMORTAL 40 16.7%
Successors Count Percentage
RESUME_CHECK 180 75.0%
COPY_FREE_VARS 60 25.0%

CALL_PY_GENERAL

Successors and predecessors for CALL_PY_GENERAL
Predecessors Count Percentage
LOAD_FAST 1,843,200 100.0%
LOAD_CONST_IMMORTAL 40 0.0%
CALL 20 0.0%
Successors Count Percentage
RESUME_CHECK 1,843,200 100.0%
MAKE_CELL 60 0.0%

COMPARE_OP_INT

Successors and predecessors for COMPARE_OP_INT
Predecessors Count Percentage
CALL_LEN 921,600 100.0%
LOAD_SMALL_INT 40 0.0%
COMPARE_OP 20 0.0%
Successors Count Percentage
POP_JUMP_IF_FALSE 921,660 100.0%

FOR_ITER_RANGE

Successors and predecessors for FOR_ITER_RANGE
Predecessors Count Percentage
JUMP_BACKWARD_NO_JIT 15,360 99.6%
GET_ITER 60 0.4%
Successors Count Percentage
STORE_FAST 15,360 99.6%
POP_ITER 60 0.4%

FOR_ITER_TUPLE

Successors and predecessors for FOR_ITER_TUPLE
Predecessors Count Percentage
EXTENDED_ARG 61,440 100.0%
Successors Count Percentage
STORE_FAST 46,080 75.0%
POP_ITER 15,360 25.0%

JUMP_BACKWARD_NO_JIT

Successors and predecessors for JUMP_BACKWARD_NO_JIT
Predecessors Count Percentage
EXTENDED_ARG 46,080 74.9%
POP_TOP 15,420 25.1%
Successors Count Percentage
EXTENDED_ARG 46,080 74.9%
FOR_ITER_RANGE 15,360 25.0%
FOR_ITER 60 0.1%

LOAD_ATTR_INSTANCE_VALUE

Successors and predecessors for LOAD_ATTR_INSTANCE_VALUE
Predecessors Count Percentage
LOAD_FAST 921,740 100.0%
LOAD_ATTR 60 0.0%
LOAD_FAST_LOAD_FAST 40 0.0%
Successors Count Percentage
LOAD_FAST_LOAD_FAST 921,600 100.0%
LOAD_ATTR_METHOD_NO_DICT 80 0.0%
TO_BOOL 60 0.0%
LOAD_ATTR 40 0.0%
CALL_PY_EXACT_ARGS 40 0.0%

LOAD_ATTR_METHOD_NO_DICT

Successors and predecessors for LOAD_ATTR_METHOD_NO_DICT
Predecessors Count Percentage
CALL_NON_PY_GENERAL 1,843,200 66.7%
LOAD_FAST 921,600 33.3%
LOAD_ATTR_INSTANCE_VALUE 80 0.0%
LOAD_ATTR 40 0.0%
Successors Count Percentage
CALL_METHOD_DESCRIPTOR_FAST 1,843,200 66.7%
LOAD_CONST_MORTAL 921,600 33.3%
LOAD_FAST_LOAD_FAST 60 0.0%
CALL_METHOD_DESCRIPTOR_NOARGS 40 0.0%
CALL 20 0.0%

LOAD_ATTR_METHOD_WITH_VALUES

Successors and predecessors for LOAD_ATTR_METHOD_WITH_VALUES
Predecessors Count Percentage
LOAD_FAST 921,680 50.0%
LOAD_GLOBAL_MODULE 921,600 50.0%
LOAD_ATTR 40 0.0%
Successors Count Percentage
LOAD_FAST 921,660 50.0%
LOAD_FAST_LOAD_FAST 921,660 50.0%

LOAD_ATTR_MODULE

Successors and predecessors for LOAD_ATTR_MODULE
Predecessors Count Percentage
LOAD_GLOBAL_MODULE 921,720 100.0%
LOAD_ATTR 60 0.0%
Successors Count Percentage
PUSH_NULL 921,720 100.0%
STORE_FAST 60 0.0%

LOAD_CONST_IMMORTAL

Successors and predecessors for LOAD_CONST_IMMORTAL
Predecessors Count Percentage
POP_ITER 15,360 96.2%
POP_TOP 180 1.1%
STORE_FAST 180 1.1%
LOAD_FAST 120 0.8%
LOAD_CONST_IMMORTAL 120 0.8%
Successors Count Percentage
RETURN_VALUE 15,540 97.4%
STORE_FAST 120 0.8%
LOAD_CONST_IMMORTAL 120 0.8%
IS_OP 60 0.4%
CALL 40 0.3%

LOAD_CONST_MORTAL

Successors and predecessors for LOAD_CONST_MORTAL
Predecessors Count Percentage
CALL_METHOD_DESCRIPTOR_FAST 921,600 50.0%
LOAD_ATTR_METHOD_NO_DICT 921,600 50.0%
BUILD_TUPLE 60 0.0%
POP_JUMP_IF_NOT_NONE 60 0.0%
Successors Count Percentage
CALL_KW_PY 921,600 50.0%
CALL_METHOD_DESCRIPTOR_FAST 921,600 50.0%
MAKE_FUNCTION 60 0.0%
STORE_FAST 60 0.0%

LOAD_GLOBAL_BUILTIN

Successors and predecessors for LOAD_GLOBAL_BUILTIN
Predecessors Count Percentage
LOAD_FAST 1,843,200 66.7%
RESUME_CHECK 921,600 33.3%
POP_JUMP_IF_FALSE 40 0.0%
LOAD_GLOBAL 20 0.0%
Successors Count Percentage
LOAD_FAST 1,843,260 66.7%
CALL_ISINSTANCE 921,600 33.3%

LOAD_GLOBAL_MODULE

Successors and predecessors for LOAD_GLOBAL_MODULE
Predecessors Count Percentage
POP_JUMP_IF_TRUE 921,600 50.0%
POP_TOP 875,520 47.5%
STORE_FAST 46,120 2.5%
RESUME_CHECK 120 0.0%
LOAD_GLOBAL 80 0.0%
Successors Count Percentage
LOAD_ATTR_MODULE 921,720 50.0%
LOAD_ATTR_METHOD_WITH_VALUES 921,600 50.0%
LOAD_ATTR 60 0.0%
LOAD_FAST_LOAD_FAST 60 0.0%

RESUME_CHECK

Successors and predecessors for RESUME_CHECK
Predecessors Count Percentage
CALL_PY_GENERAL 1,843,200 66.3%
CALL_KW_PY 921,600 33.1%
CACHE 15,420 0.6%
CALL_PY_EXACT_ARGS 180 0.0%
COPY_FREE_VARS 60 0.0%
Successors Count Percentage
LOAD_FAST 937,140 33.7%
NOP 921,600 33.1%
LOAD_GLOBAL_BUILTIN 921,600 33.1%
LOAD_GLOBAL_MODULE 120 0.0%
LOAD_GLOBAL 60 0.0%

TO_BOOL_BOOL

Successors and predecessors for TO_BOOL_BOOL
Predecessors Count Percentage
CALL_ISINSTANCE 921,600 50.0%
CALL_METHOD_DESCRIPTOR_FAST 921,600 50.0%
LOAD_FAST 40 0.0%
TO_BOOL 20 0.0%
Successors Count Percentage
POP_JUMP_IF_FALSE 1,843,200 100.0%
POP_JUMP_IF_TRUE 60 0.0%

UNPACK_SEQUENCE_TWO_TUPLE

Successors and predecessors for UNPACK_SEQUENCE_TWO_TUPLE
Predecessors Count Percentage
RETURN_VALUE 921,600 50.0%
CALL_NON_PY_GENERAL 921,600 50.0%
CALL_METHOD_DESCRIPTOR_NOARGS 40 0.0%
UNPACK_SEQUENCE 20 0.0%
Successors Count Percentage
STORE_FAST_STORE_FAST 1,843,260 100.0%

Specialization stats

Specialization stats by family

BINARY_OP

specialization stats for BINARY_OP family
Kind Count Ratio
hit
ⓘ

Specialized instructions that complete.

 60 75.0%
Success Count Ratio
Success 20 100.0%
Failure 0 0.0%

BINARY_SUBSCR

specialization stats for BINARY_SUBSCR family
Kind Count Ratio
hit
ⓘ

Specialized instructions that complete.

 60 75.0%
Success Count Ratio
Success 20 100.0%
Failure 0 0.0%

CALL

specialization stats for CALL family
Kind Count Ratio
hit
ⓘ

Specialized instructions that complete.

 4,608,420 100.0%
Success Count Ratio
Success 260 100.0%
Failure 0 0.0%

COMPARE_OP

specialization stats for COMPARE_OP family
Kind Count Ratio
hit
ⓘ

Specialized instructions that complete.

 921,660 100.0%
Success Count Ratio
Success 20 100.0%
Failure 0 0.0%

FOR_ITER

specialization stats for FOR_ITER family
Kind Count Ratio
deferred
ⓘ

Lists the number of "deferred" (i.e. not specialized) instructions executed.

 60 0.1%
hit
ⓘ

Specialized instructions that complete.

 76,860 99.9%

LOAD_ATTR

specialization stats for LOAD_ATTR family
Kind Count Ratio
deferred
ⓘ

Lists the number of "deferred" (i.e. not specialized) instructions executed.

 60 0.0%
hit
ⓘ

Specialized instructions that complete.

 6,451,860 100.0%
Success Count Ratio
Success 200 90.9%
Failure 20 9.1%

LOAD_GLOBAL

specialization stats for LOAD_GLOBAL family
Kind Count Ratio
hit
ⓘ

Specialized instructions that complete.

 4,608,300 100.0%
Success Count Ratio
Success 100 100.0%
Failure 0 0.0%

TO_BOOL

specialization stats for TO_BOOL family
Kind Count Ratio
deferred
ⓘ

Lists the number of "deferred" (i.e. not specialized) instructions executed.

 921,660 33.3%
hit
ⓘ

Specialized instructions that complete.

 1,843,260 66.7%
Success Count Ratio
Success 20 7.1%
Failure 260 92.9%
Failure kind Count Ratio
dict 240 92.3%
sequence 20 7.7%

UNPACK_SEQUENCE

specialization stats for UNPACK_SEQUENCE family
Kind Count Ratio
hit
ⓘ

Specialized instructions that complete.

 1,843,260 100.0%
Success Count Ratio
Success 20 100.0%
Failure 0 0.0%

Specialization effectiveness

specialization effectiveness

All entries are execution counts. Should add up to the total number of Tier 1 instructions executed.

Instructions Count Ratio
Basic
ⓘ

Instructions that are not and cannot be specialized, e.g. LOAD_FAST.

 42,690,360 57.5%
Not specialized
ⓘ

Instructions that could be specialized but aren't, e.g. LOAD_ATTR, BINARY_SLICE.

 922,720 1.2%
Specialized hits
ⓘ

Specialized instructions, e.g. LOAD_ATTR_MODULE that complete.

 30,600,360 41.2%
Specialized misses
ⓘ

Specialized instructions, e.g. LOAD_ATTR_MODULE that deopt.

 0 0.0%

Deferred by instruction

Breakdown of deferred (not specialized) instruction counts by family
Name Count Ratio
TO_BOOL 921,660 100.0%
FOR_ITER 60 0.0%
LOAD_ATTR 60 0.0%
BINARY_SLICE 0 0.0%
STORE_SLICE 0 0.0%
CACHE 0 0.0%
BINARY_SUBSCR 0 0.0%
CALL_FUNCTION_EX 0 0.0%
GET_ITER 0 0.0%
INTERPRETER_EXIT 0 0.0%

Misses by instruction

Breakdown of misses (specialized deopts) instruction counts by family

Call stats

Inlined calls and frame stats

This shows what fraction of calls to Python functions are inlined (i.e. not having a call at the C level) and for those that are not, where the call comes from. The various categories overlap.

Also includes the count of frame objects created.

Count Ratio
Calls to PyEval_EvalDefault 15,420 0.6%
Calls to Python functions inlined 2,765,100 99.4%
Calls via PyEval_EvalFrame (total) 15,420 0.6%
Calls via PyEval_EvalFrame (vector) 15,420 0.6%
Calls via PyEval_EvalFrame (generator) 0 0.0%
Calls via PyEval_EvalFrame (legacy) 0 0.0%
Calls via PyEval_EvalFrame (function vectorcall) 15,420 0.6%
Calls via PyEval_EvalFrame (build class) 0 0.0%
Calls via PyEval_EvalFrame (slot) 0 0.0%
Calls via PyEval_EvalFrame (function ex) 0 0.0%
Calls via PyEval_EvalFrame (api) 0 0.0%
Calls via PyEval_EvalFrame (method) 0 0.0%
Frame objects created 0 0.0%
Frames pushed 2,780,520 100.0%

Object stats

Allocations, frees and dict materializatons

Below, "allocations" means "allocations that are not from a freelist". Total allocations = "Allocations from freelist" + "Allocations".

"Inline values" is the number of values arrays inlined into objects.

The cache hit/miss numbers are for the MRO cache, split into dunder and other names.

Count Ratio
Allocations from freelist 96,783,740 51.0%
Frees to freelist 96,783,640
Allocations 93,081,880 49.0%
Allocations to 512 bytes 91,238,680 48.1%
Allocations to 4 kbytes 1,843,200 1.0%
Allocations over 4 kbytes 0 0.0%
Frees 96,153,780
Inline values 0
Interpreter mortal increfs 35,454,000 11.3%
Interpreter mortal decrefs 39,786,040 11.6%
Mortal increfs 168,668,949 53.6%
Mortal decrefs 270,029,409 78.9%
Interpreter immortal increfs 8,909,700 2.8%
Interpreter immortal decrefs 11,090,880 3.2%
Immortal increfs 101,683,809 32.3%
Immortal decrefs 21,197,309 6.2%
Materialize dict (on request) 0
Materialize dict (new key) 0
Materialize dict (too big) 0
Materialize dict (str subclass) 0
Method cache hits 191
Method cache misses 29
Method cache collisions 15
Method cache dunder hits 0
Method cache dunder misses 0

GC stats

GC collections and effectiveness

Collected/visits gives some measure of efficiency.

Generation Collections Objects collected Object visits Reachable from roots Not reachable from roots
0 0 0 0 0 0
1 0 0 0 0 0
2 0 0 0 0 0

Optimization (Tier 2) stats

statistics about the Tier 2 optimizer

Rare events

Counts of rare/unlikely events
Event Count
set class
ⓘ

Setting an object's class, obj.__class__ = ...

 0
set bases
ⓘ

Setting the bases of a class, cls.__bases__ = ...

 0
set eval frame func
ⓘ

Setting the PEP 523 frame eval function _PyInterpreterState_SetFrameEvalFunc()

 0
builtin dict
ⓘ

Modifying the builtins, __builtins__.__dict__[var] = ...

 0
func modification
ⓘ

Modifying a function, e.g. func.__defaults__ = ..., etc.

 0
watched dict modification
ⓘ

A watched dict has been modified

 0
watched globals modification
ⓘ

A watched globals() dict has been modified

 0

Meta stats

Meta statistics
Count
Number of data files 20

Stats gathered on: 2025-02-02