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warmup.php
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	<?php

	/**
	* NOTE: This is an ADVANCED feature that improves performance but adds a lot
	* of complexity! This is only suitable for production servers because workers
	* won't pick up changes between when they spawn and when they handle a request.
	*
	* Phabricator spends a significant portion of its runtime loading classes
	* and functions, even with APC enabled. Since we have very rigidly-defined
	* rules about what can go in a module (specifically: no side effects), it
	* is safe to load all the libraries before we receive a request.
	*
	* Normally, SAPIs don't provide a way to do this, but with a patched PHP-FPM
	* SAPI you can provide a warmup file that it will execute before a request
	* is received.
	*
	* We're limited in what we can do here, since request information won't
	* exist yet, but we can load class and function definitions, which is what
	* we're really interested in.
	*
	* Once this file exists, the FCGI process will drop into its normal accept loop
	* and eventually process a request.
	*/
	function __warmup__() {
	$root = dirname(dirname(dirname(dirname(__FILE__))));
	require_once $root.'/libphutil/src/__phutil_library_init__.php';
	require_once $root.'/arcanist/src/__phutil_library_init__.php';
	require_once $root.'/phabricator/src/__phutil_library_init__.php';

	// Load every symbol. We could possibly refine this -- we don't need to load
	// every Controller, for instance.
	$loader = new PhutilSymbolLoader();
	$loader->selectAndLoadSymbols();

	define('__WARMUP__', true);
	}

	__warmup__();