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6cc21c4ee6
Instead of using lookup tables, we can use a combination of shifts and
byte swapping to achieve the same thing in less cycles and with less
code.
Benchmark files
---------------
pack1.php:
```php
for ($i = 0; $i < 10_000_000; ++$i) {
pack("J", 0x7FFFFFFFFFFFFFFF);
}
```
pack2.php:
```php
for ($i = 0; $i < 4000000; ++$i) {
pack("nvc*", 0x1234, 0x5678, 65, 66);
}
```
On an i7-4790:
```
Benchmark 1: ./sapi/cli/php pack1.php
Time (mean ± σ): 408.8 ms ± 3.4 ms [User: 406.1 ms, System: 1.6 ms]
Range (min … max): 403.6 ms … 413.6 ms 10 runs
Benchmark 2: ./sapi/cli/php_old pack1.php
Time (mean ± σ): 451.7 ms ± 7.7 ms [User: 448.5 ms, System: 2.0 ms]
Range (min … max): 442.8 ms … 461.2 ms 10 runs
Summary
./sapi/cli/php pack1.php ran
1.11 ± 0.02 times faster than ./sapi/cli/php_old pack1.php
Benchmark 1: ./sapi/cli/php pack2.php
Time (mean ± σ): 239.3 ms ± 6.0 ms [User: 236.2 ms, System: 2.3 ms]
Range (min … max): 233.2 ms … 256.8 ms 12 runs
Benchmark 2: ./sapi/cli/php_old pack2.php
Time (mean ± σ): 271.9 ms ± 3.3 ms [User: 269.7 ms, System: 1.3 ms]
Range (min … max): 267.4 ms … 279.0 ms 11 runs
Summary
./sapi/cli/php pack2.php ran
1.14 ± 0.03 times faster than ./sapi/cli/php_old pack2.php
```
On an i7-1185G7:
```
Benchmark 1: ./sapi/cli/php pack1.php
Time (mean ± σ): 263.7 ms ± 1.8 ms [User: 262.6 ms, System: 0.9 ms]
Range (min … max): 261.5 ms … 268.2 ms 11 runs
Benchmark 2: ./sapi/cli/php_old pack1.php
Time (mean ± σ): 303.3 ms ± 6.5 ms [User: 300.7 ms, System: 2.3 ms]
Range (min … max): 297.4 ms … 318.1 ms 10 runs
Summary
./sapi/cli/php pack1.php ran
1.15 ± 0.03 times faster than ./sapi/cli/php_old pack1.php
Benchmark 1: ./sapi/cli/php pack2.php
Time (mean ± σ): 156.7 ms ± 2.9 ms [User: 154.7 ms, System: 1.7 ms]
Range (min … max): 151.6 ms … 164.7 ms 19 runs
Benchmark 2: ./sapi/cli/php_old pack2.php
Time (mean ± σ): 174.6 ms ± 3.3 ms [User: 171.9 ms, System: 2.3 ms]
Range (min … max): 170.7 ms … 180.4 ms 17 runs
Summary
./sapi/cli/php pack2.php ran
1.11 ± 0.03 times faster than ./sapi/cli/php_old pack2.php
```
Closes GH-18524.
Co-authored-by: divinity76 <divinity76@gmail.com>
53 lines
1.8 KiB
C
53 lines
1.8 KiB
C
/*
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+----------------------------------------------------------------------+
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| Copyright (c) The PHP Group |
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+----------------------------------------------------------------------+
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| This source file is subject to version 3.01 of the PHP license, |
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| that is bundled with this package in the file LICENSE, and is |
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| available through the world-wide-web at the following url: |
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| https://www.php.net/license/3_01.txt |
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| If you did not receive a copy of the PHP license and are unable to |
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| obtain it through the world-wide-web, please send a note to |
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| license@php.net so we can mail you a copy immediately. |
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+----------------------------------------------------------------------+
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| Author: |
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+----------------------------------------------------------------------+
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*/
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#include "basic_functions.h"
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#include "php_math.h"
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#include "php_string.h"
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#include "base64.h"
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#include "php_dir.h"
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#include "php_dns.h"
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#include "php_mail.h"
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#include "md5.h"
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#include "sha1.h"
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#include "html.h"
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#include "exec.h"
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#include "file.h"
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#include "php_ext_syslog.h"
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#include "php_filestat.h"
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#include "php_browscap.h"
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#include "url.h"
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#include "pageinfo.h"
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#include "fsock.h"
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#include "php_image.h"
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#include "info.h"
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#include "php_var.h"
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#include "quot_print.h"
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#include "dl.h"
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#include "php_crypt.h"
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#include "head.h"
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#include "php_output.h"
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#include "php_array.h"
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#include "php_assert.h"
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#include "php_versioning.h"
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#include "php_password.h"
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#include "php_version.h"
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#define PHP_STANDARD_VERSION PHP_VERSION
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#define phpext_standard_ptr basic_functions_module_ptr
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PHP_MINIT_FUNCTION(standard_filters);
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PHP_MSHUTDOWN_FUNCTION(standard_filters);
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