How PHP executes bytecode
phpunit.expert
Which compiler built your PHP binary is a performance decision: until PHP 8.5, a PHP built with Clang was up to 44 % slower than one built with GCC, depending on the benchmark. The difference is entirely in how the executor gets from one instruction to the next, and the Zend Engine has five models for that.
  • danA
    2·
    1 month ago

    Very interesting post! It’s a good technical deep dive into the guts of the compiler, yet doesn’t require background knowledge of it to be able to understand.