JSON encoding speedups #647

jcrist · 2024-02-23T04:14:12Z

An assortment of micro-optimizations and cleanups around JSON encoding:

Accelerated int and float encoding by up to ~2x for small numbers
Accelerated datetime, date, and time encoding by ~30-40%
A few code cleanups to simplify the JSON encoder handlers

Previously we first encoded these into a small stack-allocated buffer, then would `memcpy` over the results on success. We now encode directly into the output buffer, avoiding the extra `memcpy`. On small integers and floats this is up to 2x faster.

Initial benchmarks show speedups of ~30-40% across all temporal types.

jcrist added 4 commits February 22, 2024 21:40

Simplify encode for Raw objects

9e16ac9

Accelerate JSON int & float encoding

71b868a

Previously we first encoded these into a small stack-allocated buffer, then would `memcpy` over the results on success. We now encode directly into the output buffer, avoiding the extra `memcpy`. On small integers and floats this is up to 2x faster.

Accelerate datetime, date, and time JSON encoding

85eb2f7

Initial benchmarks show speedups of ~30-40% across all temporal types.

A few simplifications

5c19008

jcrist merged commit b44800c into main Feb 23, 2024
8 checks passed

jcrist deleted the encoder-cleanups branch February 23, 2024 12:42

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JSON encoding speedups #647

JSON encoding speedups #647

jcrist commented Feb 23, 2024

JSON encoding speedups #647

JSON encoding speedups #647

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jcrist commented Feb 23, 2024