Title: CPU usage
Last modified: September 1, 2016

---

# CPU usage

 *  Resolved [abhi7tomar](https://wordpress.org/support/users/abhi7tomar/)
 * (@abhi7tomar)
 * [9 years, 11 months ago](https://wordpress.org/support/topic/cpu-usage-8/)
 * when i am optimizing images always my cpu usage go up t 80-90% and virtual memory
   goes up why ?
 * is this problem ?
 * [https://wordpress.org/plugins/ewww-image-optimizer/](https://wordpress.org/plugins/ewww-image-optimizer/)

Viewing 1 replies (of 1 total)

 *  Plugin Author [Shane Bishop](https://wordpress.org/support/users/nosilver4u/)
 * (@nosilver4u)
 * [9 years, 10 months ago](https://wordpress.org/support/topic/cpu-usage-8/#post-7574098)
 * Are you optimizing locally, or via the API?
    If locally, then that is totally
   normal, optimizing uses lots of CPU, and a decent amount of memory (depending
   on image size). For example, a 5MB image might use 200MB of memory during optimization,
   because it has to be unpacked (basically into a bitmap) before recompression.
   If it causes any issues, you can disable parallel optimization, so that each 
   resized version of an image will be done in sequence, instead of all resizes 
   for each upload firing at once.

Viewing 1 replies (of 1 total)

The topic ‘CPU usage’ is closed to new replies.

 * ![](https://ps.w.org/ewww-image-optimizer/assets/icon-256x256.png?rev=1582276)
 * [EWWW Image Optimizer](https://wordpress.org/plugins/ewww-image-optimizer/)
 * [Frequently Asked Questions](https://wordpress.org/plugins/ewww-image-optimizer/#faq)
 * [Support Threads](https://wordpress.org/support/plugin/ewww-image-optimizer/)
 * [Active Topics](https://wordpress.org/support/plugin/ewww-image-optimizer/active/)
 * [Unresolved Topics](https://wordpress.org/support/plugin/ewww-image-optimizer/unresolved/)
 * [Reviews](https://wordpress.org/support/plugin/ewww-image-optimizer/reviews/)

## Tags

 * [cpu-usage](https://wordpress.org/support/topic-tag/cpu-usage/)

 * 1 reply
 * 2 participants
 * Last reply from: [Shane Bishop](https://wordpress.org/support/users/nosilver4u/)
 * Last activity: [9 years, 10 months ago](https://wordpress.org/support/topic/cpu-usage-8/#post-7574098)
 * Status: resolved