Execution thread shared stack space

[chfast]

No description provided.

[chfast]

Compared against Fizzy 0.5 (because rebase is required). Not ideal yet, but worth exploring.

fizzy/execute/blake2b/512_bytes_rounds_1_mean                     -0.0552         -0.0552            88            83            88            83
fizzy/execute/blake2b/512_bytes_rounds_16_mean                    -0.0603         -0.0603          1332          1251          1332          1251
fizzy/execute/ecpairing/onepoint_mean                             +0.0118         +0.0118        410646        415496        410650        415500
fizzy/execute/keccak256/512_bytes_rounds_1_mean                   -0.0369         -0.0369           103           100           103           100
fizzy/execute/keccak256/512_bytes_rounds_16_mean                  -0.0301         -0.0301          1517          1471          1517          1471
fizzy/execute/memset/256_bytes_mean                               -0.0182         -0.0182             7             7             7             7
fizzy/execute/memset/60000_bytes_mean                             -0.0130         -0.0130          1623          1602          1623          1602
fizzy/execute/mul256_opt0/input1_mean                             -0.0799         -0.0799            29            26            29            26
fizzy/execute/ramanujan_pi/33_runs_mean                           -0.0586         -0.0586           135           127           135           127
fizzy/execute/sha1/512_bytes_rounds_1_mean                        -0.0766         -0.0766            98            91            98            91
fizzy/execute/sha1/512_bytes_rounds_16_mean                       -0.0789         -0.0789          1371          1263          1371          1263
fizzy/execute/sha256/512_bytes_rounds_1_mean                      -0.0595         -0.0595            96            90            96            90
fizzy/execute/sha256/512_bytes_rounds_16_mean                     -0.0591         -0.0590          1319          1241          1319          1241
fizzy/execute/taylor_pi/pi_1000000_runs_mean                      -0.0329         -0.0329         41689         40316         41689         40317
fizzy/execute/micro/eli_interpreter/exec105_mean                  +0.0184         +0.0184             5             5             5             5
fizzy/execute/micro/factorial/20_mean                             -0.0146         -0.0146             1             1             1             1
fizzy/execute/micro/fibonacci/24_mean                             -0.0225         -0.0225          5227          5110          5227          5110
fizzy/execute/micro/host_adler32/1_mean                           -0.0138         -0.0138             0             0             0             0
fizzy/execute/micro/host_adler32/1000_mean                        -0.0188         -0.0188            29            29            29            29
fizzy/execute/micro/spinner/1_mean                                +0.0581         +0.0581             0             0             0             0
fizzy/execute/micro/spinner/1000_mean                             +0.0004         +0.0004            10            10            10            10

[chfast]

See #777.