日本語 
English 全体の平均表示速度 3,708 msec
WP Rocket
WP-Optimize – Cache, Compress images, Minify & Clean database to boost page speed & performance
LiteSpeed Cache
EWWW Image Optimizer
Webp Converter
WP Fastest Cache
Autoptimize
WP Super Cache
Jetpack – WP Security, Backup, Speed, & Growth
W3 Total Cache
Jetpack Boost – Website Speed, Performance and Critical CSS