日本語 
English 全体の平均表示速度 3,112 msec
WP Rocket
WP-Optimize – Cache, Compress images, Minify & Clean database to boost page speed & performance
LiteSpeed Cache
WP Fastest Cache – WordPress Cache Plugin
EWWW Image Optimizer
WP Super Cache
Autoptimize
Jetpack – WP Security, Backup, Speed, & Growth
Jetpack Boost – Website Speed, Performance and Critical CSS
W3 Total Cache