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Engine Yard PHP Performance Tools
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apc-primer Add APC Primer
opcache-primer Add APC/Zend OpCache Primer wrapper
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Engine Yard PHP Performance Tools

A small suite of simple tools to help diagnose and fix performance issues, or other performance-related tasks.

Tool list

  • Cache Primers — These tools help avoid cache stampedes
    • APC Primer — A tool for priming your APC cache
    • Cache Primer — A tool for priming any HTTP-based cache


These tools can be installed by composer. Add the following to your composer.json:

"repositories": [
        "type": "vcs",
        "url": ""
"require": {
    "php": ">=5.3.3",
    "engineyard/php-performance-tools": "dev-master"

Then run the install:

$ composer update engineyard/php-performance-tools


Each individual tool has it's own documentation within it's sub-directory

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