Perf: echo overflowable native-long via local stack box (#36386) - #37064
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This was referenced Sep 6, 2026
PurHur
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) (#37068) extractAsCString fell through TYPE_VALUE to a constant empty C string after lazy ±/×/`/` materialize; type-switch boxed args and overflow flag+f64 slots instead (peer of #37064 echo). Free only the selected arm buffer via phi. Co-authored-by: PurHur <PurHur@users.noreply.github.com> Co-authored-by: Cursor <cursoragent@cursor.com>
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Summary
{main}echo $safter lazy ±/×//materialize printed empty whileprint/var_dumpmatched Zend — leftover of Perf: lazy f64 overflow slot for native-long ±/× (#36386) #37051.TYPE_VALUEstack bindings overechoScriptGlobalName(peer of Runtime: string-key arrays are still super-linear after the DJB index — 5k keys 0.13 s, 20k keys 2.4 s, 100k keys > 120 s (Zend 0.03–0.09 s); theisset/read path or the index growth is not O(1) (lib/JIT/Builtin/Type/HashTable.php) (re-#36191) #36408/AOT: program-shaped differential corpus is 1/30 vs Zend (crashes/compile aborts) — child of #36221 #36366).php-src:
Zend/zend_vm_def.hZEND_ECHO.Part of #36386.
Test plan
./script/phpunit.sh --filter EchoOverflowableNativeLongAotTest→ 3/3./script/aot-smoke.sh→ 9/9 + size gate OKmake north-star5-verify-fast→ OK (spine 8348/8348)script/differential-sweep.sh --aot --repeat 3 --dir /tmp/diff-echo-ov→ 3/3Made with Cursor