siteGround

siteGround works well with WP Media Uploader without any changes.

While WP Media Uploader is only about 2.5 times faster in uploading files, it uses over 90% fewer CPU resources than the WordPress Media Library uploader.

Uploading the 221 test images with all media sizes via WP Media Uploader takes about 51 "CPU seconds" and 27 "Program Executions." The same WordPress Media Library upload takes 1048 " CPU seconds" and 484 "Program Executions."

Since siteGround service plans have hard limits on CPU resource usage, these savings could be helpful if your site is experiencing CPU resource limits.