Title: Images already optimized
Last modified: October 11, 2017

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# Images already optimized

 *  Resolved [AndreiD](https://wordpress.org/support/users/andreiro37/)
 * (@andreiro37)
 * [8 years, 10 months ago](https://wordpress.org/support/topic/images-already-optimized/)
 * hi,
 * i use this plugin from time to time, premium version – no real time because slows
   down the admin.
 * If today i optimize all images, then stop the plugin and after 1 month i run 
   Shortpixel again, it will know to optimize only imaegs from last month? Or will
   begin to optimize all images from the beginning of the site? It is about credit
   consumption.
 * thanks

Viewing 3 replies - 1 through 3 (of 3 total)

 *  Plugin Author [ShortPixel](https://wordpress.org/support/users/shortpixel/)
 * (@shortpixel)
 * [8 years, 10 months ago](https://wordpress.org/support/topic/images-already-optimized/#post-9579474)
 * Hi Andrei,
    thanks for your message and for using ShortPixel! 🙂
 * Yes, as long as you don’t remove ShortPixel’s metadata from your DB you can turn
   the plugin on/off anytime you want, it will “know” what was optimized and what
   not and will just resume the process. No extra credits consumed.
 * But it is a bit weird that you’re saying the admin is slowed down by ShortPixel:
   would you be willing to provide us with access to have a quick look and investigate
   this?
 * If so please contact us directly [here](https://shortpixel.com/contact).
 * Thank you,
    Alex
 *  Thread Starter [AndreiD](https://wordpress.org/support/users/andreiro37/)
 * (@andreiro37)
 * [8 years, 10 months ago](https://wordpress.org/support/topic/images-already-optimized/#post-9590680)
 * Which is the wp_post mta filed name for each post or the table name? I plan to
   use it on multiple sites, i will let you know if indeed i see is working slower
   due your plugin, i will test more.
 *  Plugin Author [ShortPixel](https://wordpress.org/support/users/shortpixel/)
 * (@shortpixel)
 * [8 years, 9 months ago](https://wordpress.org/support/topic/images-already-optimized/#post-9616228)
 * Hi Andrei,
 * ShortPixel writes additional info in the existing _wp_attachment_metadata record
   for the image, in the wp_postmeta table. It adds a two keys: ShortPixelImprovement
   and ShortPixel.
 * Please let us know if you find performance issues.
 * Thanks,
    Simon.

Viewing 3 replies - 1 through 3 (of 3 total)

The topic ‘Images already optimized’ is closed to new replies.

 * ![](https://ps.w.org/shortpixel-image-optimiser/assets/icon-256x256.gif?rev=3245715)
 * [ShortPixel Image Optimizer - Optimize Images, Convert WebP & AVIF](https://wordpress.org/plugins/shortpixel-image-optimiser/)
 * [Frequently Asked Questions](https://wordpress.org/plugins/shortpixel-image-optimiser/#faq)
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 * 3 replies
 * 2 participants
 * Last reply from: [ShortPixel](https://wordpress.org/support/users/shortpixel/)
 * Last activity: [8 years, 9 months ago](https://wordpress.org/support/topic/images-already-optimized/#post-9616228)
 * Status: resolved