[Bench] Which is faster, preg_match() or ctype_alnum() ?

0.PregMatchVsCtypeAlnumBench.php

<?php
/**
 * Benchmark between preg_match() and ctype_alnum()
 *
 *     $ phpbench run --retry-threshold=1 --revs=1000000 \
 *         --iterations=10 --report=compare --report=aggregate \
 *         ./PregMatchVsCtypeAlnumBench.php
 *
 * Requirement
 *     $ composer require phpbench/phpbench @dev --dev
 *
 * @BeforeMethods({"setUp"})
 */
class PregMatchVsCtypeAlnumBench
{
    public function setUp()
    {
        // List of characters available
        $this->list_chars = 'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789';
        $this->pattern    = '/[^A-Za-z0-9]/';

        // Generate string to test
        $len_str = 64;
        $len_list_chars = strlen($this->list_chars);
        $str_random = '';
        for ($i = 0; $i < $len_str; $i++) {
            $pos = \mt_rand() % $len_list_chars;
            $str_random .= $this->list_chars[$pos];
        }

        // Set test string
        $this->str_random = $str_random;
    }

    public function benchCtypeAlnum()
    {
        $pattern = $this->pattern;
        $subject = $this->str_random;

        if (ctype_alnum($subject)) {
            return true;
        }
        return false;
    }

    public function benchPregMatch()
    {
        $pattern = $this->pattern;
        $subject = $this->str_random;

        if (preg_match($pattern, $subject) === 0) {
            return true;
        }
        return false;
    }
}

1.composer.json

{
    "require-dev": {
        "phpbench/phpbench": "@dev"
    }
}

2.BenchResults_PHP7.1.33-macOS.sh-session

$ # -------------------------------------------------------------------------------
$ #  Bench result (Local run, macOS Mojave, PHP 7.1.33)
$ # -------------------------------------------------------------------------------
$ #
$ ./vendor/bin/phpbench run --retry-threshold=1 --revs=1000000 --iterations=10 --report=compare --report=aggregate ./PregMatchVsCtypeAlnumBench.php
PhpBench @git_tag@. Running benchmarks.

\PregMatchVsCtypeAlnumBench

    benchCtypeAlnum.........................R1 I9 [μ Mo]/r: 0.179 0.178 (μs) [μSD μRSD]/r: 0.001μs 0.38%
    benchPregMatch..........................R1 I0 [μ Mo]/r: 1.693 1.693 (μs) [μSD μRSD]/r: 0.008μs 0.45%

2 subjects, 20 iterations, 2,000,000 revs, 0 rejects, 0 failures, 0 warnings
(best [mean mode] worst) = 0.178 [0.936 0.936] 0.179 (μs)
⅀T: 18.715μs μSD/r 0.004μs μRSD/r: 0.420%

+----------------------------+-----------------+-----+---------+-----------------------------------------------------+
| benchmark                  | subject         | set | revs    | suite:1343c471444b2eadced4437583d78a4640912081:mean |
+----------------------------+-----------------+-----+---------+-----------------------------------------------------+
| PregMatchVsCtypeAlnumBench | benchCtypeAlnum | 0   | 1000000 | 0.179μs                                             |
| PregMatchVsCtypeAlnumBench | benchPregMatch  | 0   | 1000000 | 1.693μs                                             |
+----------------------------+-----------------+-----+---------+-----------------------------------------------------+

suite: 1343c471444b2eadced4437583d78a4640912081, date: 2020-05-19, stime: 03:52:51
+----------------------------+-----------------+-----+---------+-----+----------+---------+---------+---------+---------+---------+--------+-------+
| benchmark                  | subject         | set | revs    | its | mem_peak | best    | mean    | mode    | worst   | stdev   | rstdev | diff  |
+----------------------------+-----------------+-----+---------+-----+----------+---------+---------+---------+---------+---------+--------+-------+
| PregMatchVsCtypeAlnumBench | benchCtypeAlnum | 0   | 1000000 | 10  | 422,816b | 0.178μs | 0.179μs | 0.178μs | 0.179μs | 0.001μs | 0.38%  | 1.00x |
| PregMatchVsCtypeAlnumBench | benchPregMatch  | 0   | 1000000 | 10  | 422,816b | 1.681μs | 1.693μs | 1.693μs | 1.709μs | 0.008μs | 0.45%  | 9.48x |
+----------------------------+-----------------+-----+---------+-----+----------+---------+---------+---------+---------+---------+--------+-------+

$ php -v | head -1
PHP 7.1.33 (cli) (built: Jan 26 2020 22:52:32) ( NTS )

$ composer --version 
Composer version 1.9.3 2020-02-04 12:58:49

$ composer show 2>&1 | grep phpbench
phpbench/container        1.2     Simple, configurable, service container.
phpbench/dom              0.2.0   DOM wrapper to simplify working with the PHP DOM implementation
phpbench/phpbench         0.16.10 PHP Benchmarking Framework

$ sw_vers
ProductName:	Mac OS X
ProductVersion:	10.14.6
BuildVersion:	18G4032

$ # Version of compiled modules installed
$ php -r 'foreach (get_loaded_extensions() as $extension) echo "$extension: " . phpversion($extension) . PHP_EOL;'
Core: 7.1.33
date: 7.1.33
libxml: 7.1.33
openssl: 7.1.33
pcre: 7.1.33
sqlite3: 7.1.33
zlib: 7.1.33
bcmath: 7.1.33
bz2: 7.1.33
calendar: 7.1.33
ctype: 7.1.33
curl: 7.1.33
dba: 7.1.33
dom: 20031129
hash: 1.0
fileinfo: 1.0.5
filter: 7.1.33
ftp: 7.1.33
gd: 7.1.33
SPL: 7.1.33
iconv: 7.1.33
json: 1.5.0
ldap: 7.1.33
mbstring: 7.1.33
session: 7.1.33
standard: 7.1.33
mysqlnd: mysqlnd 5.0.12-dev - 20150407 - $Id: 38fea24f2847fa7519001be390c98ae0acafe387 $
PDO: 7.1.33
pdo_mysql: 7.1.33
pdo_pgsql: 7.1.33
pdo_sqlite: 7.1.33
pgsql: 7.1.33
Phar: 2.0.2
posix: 7.1.33
readline: 7.1.33
Reflection: 7.1.33
mysqli: 7.1.33
shmop: 7.1.33
SimpleXML: 7.1.33
snmp: 0.1
soap: 7.1.33
sockets: 7.1.33
exif: 7.1.33
sysvmsg: 7.1.33
sysvsem: 7.1.33
sysvshm: 7.1.33
tidy: 7.1.33
tokenizer: 7.1.33
wddx: 7.1.33
xml: 7.1.33
xmlreader: 7.1.33
xmlrpc: 7.1.33
xmlwriter: 7.1.33
xsl: 7.1.33
zip: 1.13.5

3.BenchResults_PHP7.1.33.sh-session

/app # # -------------------------------------------------------------------------------
/app # #  Bench result (Docker, php:7.1.33-cli-alpine)
/app # # -------------------------------------------------------------------------------
/app #
/app # ./vendor/bin/phpbench run --retry-threshold=1 --revs=1000000 --iterations=10 --report=compare --report=aggregate ./PregMatchVsCtypeAlnumBench.php

PhpBench @git_tag@. Running benchmarks.

\PregMatchVsCtypeAlnumBench

    benchCtypeAlnum.........................R1 I8 [μ Mo]/r: 0.796 0.796 (μs) [μSD μRSD]/r: 0.004μs 0.51%
    benchPregMatch..........................R1 I7 [μ Mo]/r: 0.425 0.426 (μs) [μSD μRSD]/r: 0.002μs 0.56%

2 subjects, 20 iterations, 2,000,000 revs, 0 rejects, 0 failures, 0 warnings
(best [mean mode] worst) = 0.421 [0.611 0.611] 0.429 (μs)
⅀T: 12.211μs μSD/r 0.003μs μRSD/r: 0.538%

+----------------------------+-----------------+-----+---------+-----------------------------------------------------+
| benchmark                  | subject         | set | revs    | suite:1343c47122614c102116bf78b2ecc38234e3b0f3:mean |
+----------------------------+-----------------+-----+---------+-----------------------------------------------------+
| PregMatchVsCtypeAlnumBench | benchCtypeAlnum | 0   | 1000000 | 0.796μs                                             |
| PregMatchVsCtypeAlnumBench | benchPregMatch  | 0   | 1000000 | 0.425μs                                             |
+----------------------------+-----------------+-----+---------+-----------------------------------------------------+

suite: 1343c47122614c102116bf78b2ecc38234e3b0f3, date: 2020-05-19, stime: 03:35:16
+----------------------------+-----------------+-----+---------+-----+----------+---------+---------+---------+---------+---------+--------+-------+
| benchmark                  | subject         | set | revs    | its | mem_peak | best    | mean    | mode    | worst   | stdev   | rstdev | diff  |
+----------------------------+-----------------+-----+---------+-----+----------+---------+---------+---------+---------+---------+--------+-------+
| PregMatchVsCtypeAlnumBench | benchCtypeAlnum | 0   | 1000000 | 10  | 414,896b | 0.790μs | 0.796μs | 0.796μs | 0.803μs | 0.004μs | 0.51%  | 1.87x |
| PregMatchVsCtypeAlnumBench | benchPregMatch  | 0   | 1000000 | 10  | 414,896b | 0.421μs | 0.425μs | 0.426μs | 0.429μs | 0.002μs | 0.56%  | 1.00x |
+----------------------------+-----------------+-----+---------+-----+----------+---------+---------+---------+---------+---------+--------+-------+

/app # php -v | head -1
PHP 7.1.33 (cli) (built: Oct 25 2019 07:17:47) ( NTS )

/app # composer --version
Composer version 1.10.6 2020-05-06 10:28:10

/app # composer show 2>&1 | grep phpbench
phpbench/container        1.2     Simple, configurable, service container.
phpbench/dom              0.2.0   DOM wrapper to simplify working with the PHP DOM implementation
phpbench/phpbench         0.16.10 PHP Benchmarking Framework

/app # cat /etc/os-release | grep PRETTY_NAME
PRETTY_NAME="Alpine Linux v3.10"

4.BenchResults_PHP7.4.5.sh-session

/app # # -------------------------------------------------------------------------------
/app # #  Bench result (Docker, php:7.4.5-cli-alpine)
/app # # -------------------------------------------------------------------------------
/app #
/app # ./vendor/bin/phpbench run --retry-threshold=1 --revs=1000000 --iterations=10 --report=compare --report=aggregate ./PregMatchVsCtypeAlnumBench.php

PhpBench @git_tag@. Running benchmarks.

\PregMatchVsCtypeAlnumBench

    benchCtypeAlnum.........................R1 I7 [μ Mo]/r: 0.662 0.660 (μs) [μSD μRSD]/r: 0.003μs 0.50%
    benchPregMatch..........................R2 I7 [μ Mo]/r: 0.215 0.216 (μs) [μSD μRSD]/r: 0.001μs 0.50%

2 subjects, 20 iterations, 2,000,000 revs, 0 rejects, 0 failures, 0 warnings
(best [mean mode] worst) = 0.214 [0.438 0.438] 0.217 (μs)
⅀T: 8.770μs μSD/r 0.002μs μRSD/r: 0.499%

+----------------------------+-----------------+-----+---------+-----------------------------------------------------+
| benchmark                  | subject         | set | revs    | suite:1343c47e20292d83fe245094977e91decfee3831:mean |
+----------------------------+-----------------+-----+---------+-----------------------------------------------------+
| PregMatchVsCtypeAlnumBench | benchCtypeAlnum | 0   | 1000000 | 0.662μs                                             |
| PregMatchVsCtypeAlnumBench | benchPregMatch  | 0   | 1000000 | 0.215μs                                             |
+----------------------------+-----------------+-----+---------+-----------------------------------------------------+

suite: 1343c47e20292d83fe245094977e91decfee3831, date: 2020-05-19, stime: 03:21:39
+----------------------------+-----------------+-----+---------+-----+----------+---------+---------+---------+---------+---------+--------+-------+
| benchmark                  | subject         | set | revs    | its | mem_peak | best    | mean    | mode    | worst   | stdev   | rstdev | diff  |
+----------------------------+-----------------+-----+---------+-----+----------+---------+---------+---------+---------+---------+--------+-------+
| PregMatchVsCtypeAlnumBench | benchCtypeAlnum | 0   | 1000000 | 10  | 455,968b | 0.657μs | 0.662μs | 0.660μs | 0.666μs | 0.003μs | 0.50%  | 3.07x |
| PregMatchVsCtypeAlnumBench | benchPregMatch  | 0   | 1000000 | 10  | 455,968b | 0.214μs | 0.215μs | 0.216μs | 0.217μs | 0.001μs | 0.50%  | 1.00x |
+----------------------------+-----------------+-----+---------+-----+----------+---------+---------+---------+---------+---------+--------+-------+

/app # php -v | head -1
PHP 7.4.5 (cli) (built: Apr 17 2020 11:56:45) ( NTS )

/app # composer show 2>&1 | grep phpbench
phpbench/container        1.2                Simple, configurable, service container.
phpbench/dom              0.2.0              DOM wrapper to simplify working with the PHP DOM implementation
phpbench/phpbench         dev-master 7c3e155 PHP Benchmarking Framework

/app # cat /etc/os-release | grep PRETTY_NAME
PRETTY_NAME="Alpine Linux v3.11"

5.BenchResults_PHP8-dev.sh-session

/app # # -------------------------------------------------------------------------------
/app # #  Bench result (Docker, keinos/php8-jit:latest)
/app # # -------------------------------------------------------------------------------
/app #
/app # ./vendor/bin/phpbench run --retry-threshold=1 --revs=1000000 --iterations=10 --report=compare --report=aggregate ./PregMatchVsCtypeAlnumBench.php

PhpBench @git_tag@. Running benchmarks.

\PregMatchVsCtypeAlnumBench

    benchCtypeAlnum.........................R1 I2 [μ Mo]/r: 0.670 0.670 (μs) [μSD μRSD]/r: 0.002μs 0.35%
    benchPregMatch..........................R3 I7 [μ Mo]/r: 0.229 0.230 (μs) [μSD μRSD]/r: 0.001μs 0.56%

2 subjects, 20 iterations, 2,000,000 revs, 0 rejects, 0 failures, 0 warnings
(best [mean mode] worst) = 0.227 [0.450 0.450] 0.231 (μs)
⅀T: 8.991μs μSD/r 0.002μs μRSD/r: 0.456%

+----------------------------+-----------------+-----+---------+-----------------------------------------------------+
| benchmark                  | subject         | set | revs    | suite:1343c47e481511132c08cfb70f13e90c9db7ea22:mean |
+----------------------------+-----------------+-----+---------+-----------------------------------------------------+
| PregMatchVsCtypeAlnumBench | benchCtypeAlnum | 0   | 1000000 | 0.670μs                                             |
| PregMatchVsCtypeAlnumBench | benchPregMatch  | 0   | 1000000 | 0.229μs                                             |
+----------------------------+-----------------+-----+---------+-----------------------------------------------------+

suite: 1343c47e481511132c08cfb70f13e90c9db7ea22, date: 2020-05-19, stime: 03:41:46
+----------------------------+-----------------+-----+---------+-----+----------+---------+---------+---------+---------+---------+--------+-------+
| benchmark                  | subject         | set | revs    | its | mem_peak | best    | mean    | mode    | worst   | stdev   | rstdev | diff  |
+----------------------------+-----------------+-----+---------+-----+----------+---------+---------+---------+---------+---------+--------+-------+
| PregMatchVsCtypeAlnumBench | benchCtypeAlnum | 0   | 1000000 | 10  | 444,728b | 0.666μs | 0.670μs | 0.670μs | 0.674μs | 0.002μs | 0.35%  | 2.92x |
| PregMatchVsCtypeAlnumBench | benchPregMatch  | 0   | 1000000 | 10  | 444,728b | 0.227μs | 0.229μs | 0.230μs | 0.231μs | 0.001μs | 0.56%  | 1.00x |
+----------------------------+-----------------+-----+---------+-----+----------+---------+---------+---------+---------+---------+--------+-------+

/app # php -v | head -1
PHP 8.0.0-dev (cli) (built: Oct  2 2019 10:21:08) ( NTS )

/app # composer --version
Composer version 1.10.6 2020-05-06 10:28:10

/app # composer show 2>&1 | grep phpbench
phpbench/container        1.2     Simple, configurable, service container.
phpbench/dom              0.2.0   DOM wrapper to simplify working with the PHP DOM implementation
phpbench/phpbench         0.16.10 PHP Benchmarking Framework

/app # cat /etc/os-release | grep PRETTY_NAME
PRETTY_NAME="Alpine Linux v3.10"