OllieJones

WooCommerce’s Order and Subscription pages allow store owners to search for orders and subscriptions by customer name, email, and other attributes. By default, it does a general substring search. For example, if you put OllieJones into the search box, it will search with <code>LIKE '%OllieJones%'</code> using the leading wildcard <code>%</code>. That’s astonishingly slow on sites with many orders.
Upon activation this plugin uses ActionScheduler to run a background process to create a special-purpose index table, a table of trigrams, to speed up that search. Then it uses those trigrams to search for orders.
The downside: the trigram table takes database space and takes time to generate.
The orders page itself contains a slow query to look up meta_keys. This fixes that query’s performance too, using a cache of available values.
<h4>If you have problems</h4>
The WordPress and WooCommerce ecosystems offer many optional features enabled by plugins. And, WooCommerce sites run on many different versions of database server. It is not possible to test this plugin on every imaginable combination. So, you may have problems getting it to work.
Sometimes the process of creating the index table does not complete correctly. And, sometimes you cannot find some orders after the index is created.
If you tell the author about these problems, he will attempt to fix them. Please create a support topic, then visit Site Health, view the Info tab, click the Copy Site Info to Clipboard button, and paste that information into the support topic. And, of course, please describe what is going wrong.
<h4>Credits</h4>
Thanks to Leho Kraav for bringing this problem to my attention.
Thanks to Sebastian Sommer and Maxime Michaud for using early versions of the plugin on large stores, and to Maxime Michaud for creating the transation into French.
Thanks to Jetbrains for the use of their software development tools, especially <a href="https://www.jetbrains.com/phpstorm/" rel="nofollow ugc">PhpStorm</a>. It’s hard to imagine how a plugin like this one could be developed without PhpStorm’s tools for exploring epic code bases like WordPress’s.
<h4>How can I learn more about making my WordPress site more efficient?</h4>
We offer several plugins to help with your site’s database efficiency. You can <a href="https://www.plumislandmedia.net/wordpress/performance/optimizing-wordpress-database-servers/" rel="nofollow ugc">read about them here</a>.

Fast Woo Order Lookup


this is, by far, the "must have" plugin for big shops, pair this with HPOS and you search in 300k+ orders in less than 1 second! (with 100 order listing!).very great work, this should be merged in core!


holy grail of shop managers

Searches for orders faster on WooCommerce stores with many orders.

Open Tools

The most flexible and complete solution for your WooCommerce webshop to customize your order numbers!
By default, WooCommerce uses the WordPress post ID of the order, which result in gaps between the order numbers. With this plugin you can configure the order numbers to have consecutive counters. Furthermore, the order number can contain the year, and the counter can be configured to reset each year.
The number format is a simple string, where # indicates the counter. 
To get order numbers like “WC-376”, “WC-377”, “WC-378”, etc., simply set the format to “WC-#”.
The plugin comes in two flavors:
<ul>
<li>This free basic version, which provides sequential numbers and allows arbitrary text (prefix / postfix) in the numbers</li>
<li>The paid advanced version, with lots of additional features:
<ul>
<li>Counter formatting: initial value, counter increments, number padding</li>
<li>Flexible counter resets</li>
<li>Lots of variables to be used in the formats
<ul>
<li>date/time: year, month, day, hour, etc.</li>
<li>address: customer country, zip, name, etc.</li>
<li>order-specific: Number of articles, products, order total etc.</li>
<li>product categories, shipping method</li>
</ul>
</li>
<li>Custom variable definitions (with conditions on available variables)</li>
<li>Multiple concurrent counters (e.g. numbering per country, per day, per ZIP, …)</li>
<li>Different order numbers for free orders (e.g. “FREE-01” for free orders)</li>
<li>Different number format for e.g. certain IP addresses (for testing)</li>
<li>Different number format depending on products, product categories, shipping classes</li>
<li>Customize invoice numbers (only for the “WooCommerce PDF Invoices and Package Slips” plugin)</li>
<li>Different numbers depending on vendors (WC Product Vendors, WC Vendors and YITH WC Multi Vendor plugins)</li>
</ul>
</li>
</ul>
For the full documentation of both the basic and the advanced ordernumbers plugin for WooCommerce, see: 
http://open-tools.net/documentation/advanced-order-numbers-for-woocommerce.html

WooCommerce Basic Ordernumbers

Customize order numbers for WooCommerce. The order numbers can contain arbitrary text and a running counter.

Fast Woo Order Lookup vs WooCommerce Basic Ordernumbers