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ext/json: Add SSE2/NEON fast path for clean-string runs in php_json_escape_string() #23675

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ext/json: Add SSE2/NEON fast path for clean-string runs in php_json_escape_string() #23675

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5 changes: 5 additions & 0 deletions NEWS
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Original file line number Diff line number Diff line change
Expand Up @@ -54,6 +54,11 @@ PHP NEWS
- MySQLnd:
. Fixed field_count not resetting on OK packet. (Kamil Tekiela)

- JSON:
. Added a vectorized (SSE2/NEON) fast path to php_json_escape_string()
that bulk-copies runs of bytes which need no escaping, speeding up
json_encode() on ASCII-heavy strings. (adapik)

- Opcache:
. Fixed range inference of assignments through typed references.
(Ilia Alshanetsky)
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7 changes: 7 additions & 0 deletions UPGRADING
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Expand Up @@ -96,6 +96,13 @@ PHP 8.7 UPGRADE NOTES
14. Performance Improvements
========================================

- JSON:
. Improve performance of encoding arrays and objects.
. Improved performance of indentation generation in json_encode()
when using PHP_JSON_PRETTY_PRINT.
. Added an SSE2/NEON fast path for encoding strings that need no
escaping, speeding up json_encode() on ASCII-heavy payloads.

- Standard:
. Improved performance of strcspn() and strpbrk() when searching longer strings
with a single-byte character mask.
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