We'll create fresh WordPress site with Defer Transactional Emails for WooCommerce | Speed up the WooCommerce checkout installed. You have 20 minutes to test the plugin after that site we'll be deleted.
It will speed up the checkout of WooCommerce by deferring transactional emails.
In many environments the emails that are sent when the user places an order slow down the checkout process.
Deferring those emails can drastically speed up the checkout in those cases.
The difference in terms of performance will be huge in some environments and not noticeable in others.
Anyway, if you have a slow checkout, try this plugin. If the slowness was caused by the sending of the emails, you will probably solve the issue by deferring the emails.
To defer the transactional emails, just install this plugin and activate it. It has no settings.