This plugin is outdated and might not be supported anymore
WP Speed 404

WP Speed 404

Details
View on WordPress

404 errors are generally very ‘expensive’ on WP sites as they cause WP to run on every attempt, slowing
down your site and causing additional load on your web hosting environment.

WP Speed 404 can either suppress or log and email any 404 errors affecting your site under wp-content, wp-admin and
wp-includes (configurable).

Details

Plugin code:
wp-speed-404
Plugin version:
1.0
Outdated:
Yes
WP version:
4.2 or higher
PHP version:
or higher
Test up to WP version:
4.8.25
Total installations:
200
Last updated:
2017-09-18
Rating:
Times rated:
3
404
performance
speed