Benchmarking different startsWith strategies

benchmark.php

<?php
$providers = [
  'Illuminate\Auth\AuthServiceProvider',
  'Illuminate\Broadcasting\BroadcastServiceProvider',
  'Illuminate\Bus\BusServiceProvider',
  'Illuminate\Cache\CacheServiceProvider',
  'Illuminate\Foundation\Providers\ConsoleSupportServiceProvider',
  'Illuminate\Cookie\CookieServiceProvider',
  'Illuminate\Database\DatabaseServiceProvider',
  'Illuminate\Encryption\EncryptionServiceProvider',
  'Illuminate\Filesystem\FilesystemServiceProvider',
  'Illuminate\Foundation\Providers\FoundationServiceProvider',
  'Illuminate\Hashing\HashServiceProvider',
  'Illuminate\Mail\MailServiceProvider',
  'Illuminate\Notifications\NotificationServiceProvider',
  'Illuminate\Pagination\PaginationServiceProvider',
  'Illuminate\Pipeline\PipelineServiceProvider',
  'Illuminate\Queue\QueueServiceProvider',
  'Illuminate\Redis\RedisServiceProvider',
  'Illuminate\Auth\Passwords\PasswordResetServiceProvider',
  'Illuminate\Session\SessionServiceProvider',
  'Illuminate\Translation\TranslationServiceProvider',
  'Illuminate\Validation\ValidationServiceProvider',
  'Illuminate\View\ViewServiceProvider',
  'App\Providers\AppServiceProvider',
  'App\Providers\AuthServiceProvider',
  'App\Providers\RouteServiceProvider',

];
$nb = 1000000;
foreach($providers as $provider) {
$t1 = microtime(true);
for ($i = $nb; $i--; ) {
  substr($provider, 0, strlen('Illuminate\\')) === 'Illuminate\\';
}
$t2 = microtime(true);
for ($i = $nb; $i--; ) {
  strpos($provider, 'Illuminate\\') === 0;
}
$t3 = microtime(true);
for ($i = $nb; $i--; ) {
  Str::startsWith($provider, 'Illuminate\\');
}
$t4 = microtime(true);
$times = [
  'substr' => $t2 - $t1,
  'strpos' => $t3 - $t2,
  'startswith' => $t4 - $t3,
];
asort($times);
echo "Provider: $provider" . PHP_EOL;
print_r($times);

results.log

Provider: Illuminate\Auth\AuthServiceProvider
Array
(
    [strpos] => 0.072001934051514
    [substr] => 0.12313508987427
    [startswith] => 0.27450609207153
)
Provider: Illuminate\Broadcasting\BroadcastServiceProvider
Array
(
    [strpos] => 0.070228099822998
    [substr] => 0.12977004051208
    [startswith] => 0.27725291252136
)
Provider: Illuminate\Bus\BusServiceProvider
Array
(
    [strpos] => 0.072039127349854
    [substr] => 0.13160586357117
    [startswith] => 0.28314590454102
)
Provider: Illuminate\Cache\CacheServiceProvider
Array
(
    [strpos] => 0.07361888885498
    [substr] => 0.12834000587463
    [startswith] => 0.27815103530884
)
Provider: Illuminate\Foundation\Providers\ConsoleSupportServiceProvider
Array
(
    [strpos] => 0.074341058731079
    [substr] => 0.13100600242615
    [startswith] => 0.27711987495422
)
Provider: Illuminate\Cookie\CookieServiceProvider
Array
(
    [strpos] => 0.075760841369629
    [substr] => 0.12340903282166
    [startswith] => 0.28450298309326
)
Provider: Illuminate\Database\DatabaseServiceProvider
Array
(
    [strpos] => 0.07166314125061
    [substr] => 0.12988090515137
    [startswith] => 0.27933788299561
)
Provider: Illuminate\Encryption\EncryptionServiceProvider
Array
(
    [strpos] => 0.082395076751709
    [substr] => 0.12779498100281
    [startswith] => 0.28107500076294
)
Provider: Illuminate\Filesystem\FilesystemServiceProvider
Array
(
    [strpos] => 0.072663068771362
    [substr] => 0.13360500335693
    [startswith] => 0.28483891487122
)
Provider: Illuminate\Foundation\Providers\FoundationServiceProvider
Array
(
    [strpos] => 0.075443029403687
    [substr] => 0.12512111663818
    [startswith] => 0.27893304824829
)
Provider: Illuminate\Hashing\HashServiceProvider
Array
(
    [strpos] => 0.071493148803711
    [substr] => 0.12965297698975
    [startswith] => 0.27605295181274
)
Provider: Illuminate\Mail\MailServiceProvider
Array
(
    [strpos] => 0.071806907653809
    [substr] => 0.13145995140076
    [startswith] => 0.27304601669312
)
Provider: Illuminate\Notifications\NotificationServiceProvider
Array
(
    [strpos] => 0.074597835540771
    [substr] => 0.12284398078918
    [startswith] => 0.27880120277405
)
Provider: Illuminate\Pagination\PaginationServiceProvider
Array
(
    [strpos] => 0.068490028381348
    [substr] => 0.12517094612122
    [startswith] => 0.27783393859863
)
Provider: Illuminate\Pipeline\PipelineServiceProvider
Array
(
    [strpos] => 0.073277950286865
    [substr] => 0.13213014602661
    [startswith] => 0.27314805984497
)
Provider: Illuminate\Queue\QueueServiceProvider
Array
(
    [strpos] => 0.07514500617981
    [substr] => 0.1423180103302
    [startswith] => 0.28454995155334
)
Provider: Illuminate\Redis\RedisServiceProvider
Array
(
    [strpos] => 0.066940784454346
    [substr] => 0.18014216423035
    [startswith] => 0.25082206726074
)
Provider: Illuminate\Auth\Passwords\PasswordResetServiceProvider
Array
(
    [strpos] => 0.072724103927612
    [substr] => 0.11324310302734
    [startswith] => 0.27059698104858
)
Provider: Illuminate\Session\SessionServiceProvider
Array
(
    [strpos] => 0.064407825469971
    [substr] => 0.16698908805847
    [startswith] => 0.27252101898193
)
Provider: Illuminate\Translation\TranslationServiceProvider
Array
(
    [strpos] => 0.05722188949585
    [substr] => 0.10263609886169
    [startswith] => 0.23073506355286
)
Provider: Illuminate\Validation\ValidationServiceProvider
Array
(
    [strpos] => 0.056895971298218
    [substr] => 0.10267806053162
    [startswith] => 0.22989797592163
)
Provider: Illuminate\View\ViewServiceProvider
Array
(
    [strpos] => 0.06043004989624
    [substr] => 0.10628986358643
    [startswith] => 0.23639607429504
)
Provider: App\Providers\AppServiceProvider
Array
(
    [strpos] => 0.057359933853149
    [substr] => 0.10387992858887
    [startswith] => 0.24357295036316
)
Provider: App\Providers\AuthServiceProvider
Array
(
    [strpos] => 0.056458234786987
    [substr] => 0.10904884338379
    [startswith] => 0.24451684951782
)
Provider: App\Providers\RouteServiceProvider
Array
(
    [strpos] => 0.057311058044434
    [substr] => 0.10585999488831
    [startswith] => 0.24377584457397
)