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Similar todos
Benchmark PHP8.4 for a billion loops according to benjdd.com/loops/ and find out PHP is about as fast as NodeJS now
run PHP7 .2 and PHP 8 besides eachother on 2 different Linux sockets and match filtering API in nginx so that it runs on PHP8 twice as fast (<20ms response time) 
#nomads (thx @daniellockyer for nginx help)
run PHP version checker on top 1000 (may be some false positives) 
#upgradeyourphp
add php opcode caching to server 
#ctr
refactor super slow php calculations into a single 50ms SQL statement #ctr
Rewrite all .php with using PDO #improve
upgrade PHP #nomads
messing around with php
switch previous optimization of adding unserialize with a cached PHP file to speed up tag pages 
#remoteok
update php
upgrade @stephenfjohnson's PHP
research memory leak with this pypi.python.org/pypi/memory_p… or this pythonhosted.org/Pympler/ 
#financialtoolbelt
