Intro
A list of micro-optimization tests / benchmarks. No guessing - just code and results. See testing page if you want to know the details of how each micro-optimization was tested. Add new code for the comparison - the tests will be run shortly.
is_a vs instanceof
f1 is slower than f2 by 0%
Use empty function or direct comparison (with undefined variable)
f2 is slower than f1 by 799.89% (8 times slower)
Use empty function or direct comparison (with defined variable)
f2 is slower than f1 by 4.95%
str_replace vs implode explode
f1 is slower than f2 by 148.1% (1.5 times slower)
str_replace vs preg_replace (without regular expression)
f2 is slower than f1 by 40.33%
file_exists vs is_file (existing files with error ignore)
f1 is slower than f2 by 68.72%
file_exists vs is_file (non existing files)
f1 is slower than f2 by 8.03%
file_exists vs is_file (existing files)
f1 is slower than f2 by 150.73% (1.5 times slower)
Extended if vs short if
f2 is slower than f1 by 1.36%
String concatenate vs implode()
f2 is slower than f1 by 10.05%
drupal_static normal vs advanced usage
f1 is slower than f2 by 1765.96% (17.7 times slower)
Access 1-dimentional array normally vs alias (reference)
f1 is slower than f2 by 5.78%
Access array normally vs alias (reference)
f2 is slower than f1 by 4.59%
Inside foreach: access to copied value vs access to the original array
f2 is slower than f1 by 25.94%
Equal vs identical comparison operator
f1 is slower than f2 by 134.38% (1.3 times slower)
echo vs printf
f2 is slower than f1 by 59.03%
explode vs preg_split
f2 is slower than f1 by 55.94%
isset vs array_key_exists
f2 is slower than f1 by 472.82% (4.7 times slower)
Single vs double quotes
f2 is slower than f1 by 1.66%
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