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warmup.php
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Fri, Jun 28, 17:01

warmup.php
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<?php
/*
* Copyright 2012 Facebook, Inc.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
/**
* 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();
// Force load of the Celerity map.
CelerityResourceMap::getInstance();
define('__WARMUP__', true);
}
__warmup__();

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