Does memory_get_peak_usage() returns memory of the whole php or just the current execution?

function, memory, php

Solution

It returns the peak usage for the current request only.

From the doc:

Returns the peak of memory, in bytes, that's been allocated to your PHP script.

To remove any ambiguities from the docs:

memory_get_peak_usage() calls the internal zend_memory_peak_usage() function, which returns `AG(mm_heap)->peak`.

`AG(mm_heap)->peak` is reset to `0` in zend_mm_shutdown(), which is called in php_request_shutdown() at the end of each request.

So it's the peak memory usage for the current request only.

Problem

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