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Add installing and support details to README

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Daniel Bachhuber 2016-08-29 07:20:58 -07:00
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Installing the `wp profile` command is a three-step process:
1. Download the package from the URL in the purchase email.
2. Extract the package files.
3. Run `wp --require=command.php profile` to execute the profiler.

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`wp profile` monitors key performance indicators of the WordPress execution process to help you quickly identify points of slowness.
Save tens of minutes diagnosing slow WordPress sites. Because you can install and run `wp profile` on any server that supports WP-CLI, it compliments Xdebug and New Relic by pointing you in the right direction for further debugging. And, because it's a WP-CLI command, using `wp profile` means you don't have to install a plugin and deal with the painful dashboard of a slow WordPress site.
First, run `wp profile` to see metrics for each stage of the WordPress load process:
```
$ wp profile
+------------+---------+------------+-------------+-------------+------------+--------------+-----------+------------+--------------+---------------+
| stage | time | query_time | query_count | cache_ratio | cache_hits | cache_misses | hook_time | hook_count | request_time | request_count |
+------------+---------+------------+-------------+-------------+------------+--------------+-----------+------------+--------------+---------------+
| bootstrap | 2.0408s | 0.0365s | 15 | 93.21% | 412 | 30 | 0.9299s | 3097 | 0s | 0 |
| main_query | 0.0123s | 0.0004s | 3 | 94.29% | 33 | 2 | 0.0098s | 79 | 0s | 0 |
| template | 0.305s | 0.0175s | 179 | 91.02% | 2636 | 260 | 0.1125s | 7777 | 0s | 0 |
+------------+---------+------------+-------------+-------------+------------+--------------+-----------+------------+--------------+---------------+
| total | 2.3582s | 0.0544s | 197 | 92.84% | 3081 | 292 | 1.0522s | 10953 | 0s | 0 |
+------------+---------+------------+-------------+-------------+------------+--------------+-----------+------------+--------------+---------------+
```
Then, use `--stage=<stage>` to dive into higher fidelity of a particular stage:
```
$ wp profile --stage=bootstrap
+-------------------+---------+------------+-------------+-------------+------------+--------------+--------------+---------------+
| hook | time | query_time | query_count | cache_ratio | cache_hits | cache_misses | request_time | request_count |
+-------------------+---------+------------+-------------+-------------+------------+--------------+--------------+---------------+
| | 0.3558s | 0.0014s | 1 | 25% | 1 | 3 | 0s | 0 |
| muplugins_loaded | 0.0002s | 0s | 0 | 50% | 1 | 1 | 0s | 0 |
| | 0.8075s | 0.0007s | 6 | 73.68% | 56 | 20 | 0s | 0 |
| plugins_loaded | 0.4271s | 0s | 0 | 100% | 138 | 0 | 0s | 0 |
| | 0.0046s | 0s | 0 | 100% | 6 | 0 | 0s | 0 |
| setup_theme | 0s | 0s | 0 | | 0 | 0 | 0s | 0 |
| | 0.2401s | 0s | 0 | 100% | 26 | 0 | 0s | 0 |
| after_setup_theme | 0.0007s | 0s | 0 | 100% | 4 | 0 | 0s | 0 |
| | 0.0001s | 0s | 0 | 100% | 2 | 0 | 0s | 0 |
| init | 0.2922s | 0.0016s | 8 | 96.3% | 156 | 6 | 0s | 0 |
| | 0.0277s | 0s | 0 | 100% | 2 | 0 | 0s | 0 |
| wp_loaded | 0.01s | 0s | 0 | | 0 | 0 | 0s | 0 |
+-------------------+---------+------------+-------------+-------------+------------+--------------+--------------+---------------+
| total | 2.166s | 0.0037s | 15 | 84.5% | 392 | 30 | 0s | 0 |
+-------------------+---------+------------+-------------+-------------+------------+--------------+--------------+---------------+
```
Lastly, when you've found a specific hook you'd like to assess, use `--hook=<hook>`:
```
$ wp profile --hook=plugins_loaded
+------------------------------------------------------------+---------+------------+-------------+-------------+------------+--------------+--------------+---------------+
| callback | time | query_time | query_count | cache_ratio | cache_hits | cache_misses | request_time | request_count |
+------------------------------------------------------------+---------+------------+-------------+-------------+------------+--------------+--------------+---------------+
| wp_maybe_load_widgets() | 0.0309s | 0s | 0 | | 0 | 0 | 0s | 0 |
| wp_maybe_load_embeds() | 0.0001s | 0s | 0 | | 0 | 0 | 0s | 0 |
| VaultPress_Hotfixes->protect_jetpack_402_from_oembed_xss() | 0s | 0s | 0 | | 0 | 0 | 0s | 0 |
| _wp_customize_include() | 0s | 0s | 0 | | 0 | 0 | 0s | 0 |
| Debug_Bar_Remote_Requests() | 0s | 0s | 0 | | 0 | 0 | 0s | 0 |
| EasyRecipePlus->pluginsLoaded() | 0.0029s | 0s | 0 | 100% | 4 | 0 | 0s | 0 |
| Gamajo\GenesisHeaderNav\genesis_header_nav_i18n() | 0.0007s | 0s | 0 | | 0 | 0 | 0s | 0 |
| DS_Public_Post_Preview::init() | 0s | 0s | 0 | | 0 | 0 | 0s | 0 |
| wpseo_load_textdomain() | 0.0006s | 0s | 0 | | 0 | 0 | 0s | 0 |
| load_yoast_notifications() | 0.003s | 0s | 0 | | 0 | 0 | 0s | 0 |
| wpseo_init() | 0.101s | 0s | 0 | 100% | 70 | 0 | 0s | 0 |
| wpseo_frontend_init() | 0.0003s | 0s | 0 | 100% | 2 | 0 | 0s | 0 |
| Black_Studio_TinyMCE_Plugin->load_compatibility() | 0.0122s | 0s | 0 | | 0 | 0 | 0s | 0 |
| Jetpack::load_modules() | 0.2706s | 0s | 0 | 100% | 62 | 0 | 0s | 0 |
| function(){} | 0s | 0s | 0 | | 0 | 0 | 0s | 0 |
+------------------------------------------------------------+---------+------------+-------------+-------------+------------+--------------+--------------+---------------+
| total | 0.4226s | 0s | 0 | 100% | 138 | 0 | 0s | 0 |
+------------------------------------------------------------+---------+------------+-------------+-------------+------------+--------------+--------------+---------------+
```
Et voila! You've identified some of the sources of slowness.