Instead, it relies on the Zend Engine memory manager to deallocate the entire set of request variables in mass.
#Php 8 vs php 7 performance free
If enabled, an immediate shutdown sequence is used that doesn’t free each allocated block. opcache.fast_shutdown=1įast shutdown attempts to use a faster mechanism for clearing memory. You may increase performance by setting this to “0”. It protects from caching of incompletely updated files. (default “2”) Prevents caching files that are less than this number of seconds old. If you need to keep it enabled, see the end of this post regarding increasing the time between checks from 2 seconds to maybe 10 or more, depending on what you can live with.
For many production servers, especially when you have a separate development server, this directive can be safely disabled.
However, this convenience comes at the cost of performance, as it does add operational overhead. So by default, OPcache tries to be as developer-friendly as possible with timestamps to validate cached files. When disabled, opcache.revalidate_freq is ignored, and you must reset OPcache manually via opcache_reset(), opcache_invalidate(), or by restarting PHP for changes to the filesystem to take effect. (enabled by default “1”)If enabled, OPcache will check for updated scripts every opcache.revalidate_freq=# of seconds. Share your sweet spot settings and advice for OPcache. Also, this test was with WordPress only with other PHP web apps and scripts, these results could result in even more performance gains or less… you can read the following config options and be the judge. However, depending on your current throughput of PHP requests, you may be happy to take whatever improvements you can find. So I changed the default mpm_prefork to mpm_event (more about mpm_event: Strip Down Apache to Improve Performance & Memory Efficiency) and swapped out mod_PHP for PHP-FPM on the same 1GB/1 CPU core VPS: Next, I also tested with a 1GB/1 CPU core VPS, and the result:Īlso, although OPcache works regardless of the PHP handler used, I wanted to ensure the results were the same with PHP-FPM. PHP7 + OPcache + Tweaks benchmark graph using Apache Bench (ab): First, on a 32GB/16 CPU core VPS (Ubuntu 16.04 LTS), which resulted in the below PHP7 + OPcache vs.
Today, I ran a few quick benchmarks capturing the 2nd run data of tests.
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