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<?php function my_length1(string $a): int { $a[0] = 'f'; var_dump(memory_get_peak_usage()); return strlen($a); } $a = str_repeat("a", 100_000); var_dump(memory_get_peak_usage()); my_length1($a);
Output for git.master
int(490184) int(592616)
Output for git.master_jit
int(449648) int(552080)
Output for rfc.property-hooks
int(490152) int(592584)

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