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Comment and term meta lazyloading for `WP_Query` loops, introduced in 4.4, depended on filter callback methods belonging to `WP_Query` objects. This meant storing `WP_Query` objects in the `$wp_filter` global (via `add_filter()`), requiring that PHP retain the objects in memory, even when the local variables would typically be expunged during normal garbage collection. In cases where a large number of `WP_Query` objects were instantiated on a single pageload, and/or where the contents of the `WP_Query` objects were quite large, serious performance issues could result. We skirt this problem by moving metadata lazyloading out of `WP_Query`. The new `WP_Metadata_Lazyloader` class acts as a lazyload queue. Query instances register items whose metadata should be lazyloaded - such as post terms, or comments - and a `WP_Metadata_Lazyloader` method will intercept comment and term meta requests to perform the cache priming. Since `WP_Metadata_Lazyloader` instances are far smaller than `WP_Query` (containing only object IDs), and clean up after themselves far better than the previous `WP_Query` methods (bp only running their callbacks a single time for a given set of queued objects), the resource use is decreased dramatically. See [36525] for an earlier step in this direction. Props lpawlik, stevegrunwell, boonebgorges. Fixes #35816. git-svn-id: https://develop.svn.wordpress.org/trunk@36566 602fd350-edb4-49c9-b593-d223f7449a82 |
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| data | ||
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| tests | ||
| build.xml | ||
| multisite.xml | ||
| README.txt | ||
| wp-mail-real-test.php | ||
The short version:
1. Create a clean MySQL database and user. DO NOT USE AN EXISTING DATABASE or you will lose data, guaranteed.
2. Copy wp-tests-config-sample.php to wp-tests-config.php, edit it and include your database name/user/password.
3. $ svn up
4. Run the tests from the "trunk" directory:
To execute a particular test:
$ phpunit tests/phpunit/tests/test_case.php
To execute all tests:
$ phpunit
Notes:
Test cases live in the 'tests' subdirectory. All files in that directory will be included by default. Extend the WP_UnitTestCase class to ensure your test is run.
phpunit will initialize and install a (more or less) complete running copy of WordPress each time it is run. This makes it possible to run functional interface and module tests against a fully working database and codebase, as opposed to pure unit tests with mock objects and stubs. Pure unit tests may be used also, of course.
Changes to the test database will be rolled back as tests are finished, to ensure a clean start next time the tests are run.
phpunit is intended to run at the command line, not via a web server.