Improve http_build_query() performance #18401
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nielsdos
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Girgias
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Apr 23, 2025
nielsdos
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This allows us to avoid a call to `zend_ini_str` which took 6% of the profile on my i7-4790 for a call to `http_build_query`. Now we can just grab the value from the globals. In other files this can avoid some length recomputations.
This avoids some assembly code bloat.
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This avoids temporary allocations and some copies.
For this benchmark:
```php
for ($i=0;$i<2000000;$i++) {
http_build_query([999999 => 'foo', 'aaab' => 'def', 'aaaaa'=>1, 'aaaaaaaa' => 'a']);
}
```
On an i7-4790:
```
Benchmark 1: ./sapi/cli/php ../buildquery.php
Time (mean ± σ): 298.9 ms ± 7.3 ms [User: 295.6 ms, System: 2.3 ms]
Range (min … max): 293.6 ms … 314.0 ms 10 runs
Benchmark 2: ./sapi/cli/php_old ../buildquery.php
Time (mean ± σ): 594.8 ms ± 8.6 ms [User: 590.8 ms, System: 2.4 ms]
Range (min … max): 586.3 ms … 616.1 ms 10 runs
Summary
./sapi/cli/php ../buildquery.php ran
1.99 ± 0.06 times faster than ./sapi/cli/php_old ../buildquery.php
```
For this benchmark:
```php
for ($i=0;$i<2000000;$i++) {
http_build_query(['test' => 'aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa']);
}
```
On an i7-4790:
```
Benchmark 1: ./sapi/cli/php ../buildquery.php
Time (mean ± σ): 188.4 ms ± 6.7 ms [User: 184.6 ms, System: 2.9 ms]
Range (min … max): 182.0 ms … 205.4 ms 14 runs
Benchmark 2: ./sapi/cli/php_old ../buildquery.php
Time (mean ± σ): 323.9 ms ± 8.7 ms [User: 319.8 ms, System: 2.7 ms]
Range (min … max): 318.0 ms … 341.2 ms 10 runs
Summary
./sapi/cli/php ../buildquery.php ran
1.72 ± 0.08 times faster than ./sapi/cli/php_old ../buildquery.php
```
nielsdos
requested review from
bukka,
alexdowad and
youkidearitai
as code owners
| @@ -100,7 +100,7 @@ MBSTRING_API SAPI_TREAT_DATA_FUNC(mbstr_treat_data) | |||
| case PARSE_POST: | |||
| case PARSE_GET: | |||
| case PARSE_STRING: | |||
| separator = (char *) estrdup(PG(arg_separator).input); | |||
| separator = (char *) estrndup(ZSTR_VAL(PG(arg_separator).input), ZSTR_LEN(PG(arg_separator).input)); | |||
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I think doesn't need a char * cast.
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