Opcache Control Panel

Details Files Reset Recheck Refresh
memory
128M
95M74%free
33M25%used
0wasted
keys
128K
127K99%free
596scripts
278wasted
hits
21K
21K97%hits
5962%misses
0blacklist
restarts
3513
3513manual
0keys
0memory

general

HostVM-146-191-ubuntu
PHP VersionPHP 7.1.21 fpm-fcgi Linux
Opcache VersionZend OPcache 7.1.21
Uptime6.5 years and 4 hours
Last Restart11 minutes ago

memory

Used Memory33M
Free Memory95M
Wasted Memory0
Current Wasted Percentage0

statistics

Num Cached Scripts596
Num Cached Keys874
Max Cached Keys130987
Hits21192
Oom Restarts0
Hash Restarts0
Manual Restarts3513
Misses596
Blacklist Misses0
Blacklist Miss Ratio0
Opcache Hit Rate97.3

functions

opcache_reset
opcache_invalidate
opcache_compile_file
opcache_is_script_cached
opcache_get_configuration
opcache_get_status

optimization levels

PassDescription
1Constants subexpressions elimination (CSE) true, false, null, etc.
Optimize series of ADD_STRING / ADD_CHAR
Convert CAST(IS_BOOL,x) into BOOL(x)
Convert INIT_FCALL_BY_NAME + DO_FCALL_BY_NAME into DO_FCALL
2Convert constant operands to expected types
Convert conditional JMP with constant operands
Optimize static BRK and CONT
3Convert $a = $a + expr into $a += expr
Convert $a++ into ++$a
Optimize series of JMP
4PRINT and ECHO optimization (defunct)
5Block Optimization - most expensive pass
Performs many different optimization patterns based on control flow graph (CFG)
9Optimize register allocation (allows re-usage of temporary variables)
10Remove NOPs
directives guide | functions guide | wiki.php.net | pecl | Zend source | OCP latest