Title: compability
Last modified: July 19, 2022

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# compability

 *  Resolved [Insect Trojan](https://wordpress.org/support/users/insecttrojan/)
 * (@insecttrojan)
 * [3 years, 10 months ago](https://wordpress.org/support/topic/compability-4/)
 * hello i need help i unpick the permanently compability to test the site but i
   cant tick it back 🙁
 * The page I need help with: _[[log in](https://login.wordpress.org/?redirect_to=https%3A%2F%2Fwordpress.org%2Fsupport%2Ftopic%2Fcompability-4%2F%3Foutput_format%3Dmd&locale=en_US)
   to see the link]_

Viewing 8 replies - 1 through 8 (of 8 total)

 *  Plugin Author [Optimizing Matters](https://wordpress.org/support/users/optimizingmatters/)
 * (@optimizingmatters)
 * [3 years, 10 months ago](https://wordpress.org/support/topic/compability-4/#post-15837614)
 * confirmed, this is by design. the compatibility logic was off on “old” installations”
   but there is no need for that really 🙂
 *  Thread Starter [Insect Trojan](https://wordpress.org/support/users/insecttrojan/)
 * (@insecttrojan)
 * [3 years, 10 months ago](https://wordpress.org/support/topic/compability-4/#post-15837620)
 * ok how can i restore it in the old“old” installations”
 *  Thread Starter [Insect Trojan](https://wordpress.org/support/users/insecttrojan/)
 * (@insecttrojan)
 * [3 years, 10 months ago](https://wordpress.org/support/topic/compability-4/#post-15837697)
 * in database the autoptimize_installed_before_compatibility se to on ?
 *  Plugin Author [Optimizing Matters](https://wordpress.org/support/users/optimizingmatters/)
 * (@optimizingmatters)
 * [3 years, 10 months ago](https://wordpress.org/support/topic/compability-4/#post-15837743)
 * if you insist; yes 🙂
 * or use the `autoptimize_filter_init_compatibility` filter 😉
 *  [Nate](https://wordpress.org/support/users/goseongguy/)
 * (@goseongguy)
 * [3 years, 10 months ago](https://wordpress.org/support/topic/compability-4/#post-15838006)
 * May I ask, what are things to look for when considering to permanently enable
   this? Is the additional compatibility logic code query intensive or heavy?
    I
   see the release notes for v3.0, and I do have non-aggregated inline JS requiring
   jQuery and such. I assume it’s low-risk, but there must be a reason it’s left
   to the user to enable or not. Cheers! Nate
 *  Plugin Author [Optimizing Matters](https://wordpress.org/support/users/optimizingmatters/)
 * (@optimizingmatters)
 * [3 years, 10 months ago](https://wordpress.org/support/topic/compability-4/#post-15838057)
 * well, back in the 3.0 days the assumption was that for existing and thus confirmed
   working installations the compatibility logic brought no advantages and *could*
   cause regressions, hence compatibility was disabled for those (there are no complex/
   heavy queries in the compatibility code).
 * this new option gives users of “older installations” the option to enable compatibility
   anyway, but as it is only useful in case of problems, I would advice to keep 
   it off unless something is broken and only then to enable it to see if is automatically
   fixes the issue 🙂
 *  [Nate](https://wordpress.org/support/users/goseongguy/)
 * (@goseongguy)
 * [3 years, 10 months ago](https://wordpress.org/support/topic/compability-4/#post-15838218)
 * Thank you for the clarification!
 *  Plugin Author [Optimizing Matters](https://wordpress.org/support/users/optimizingmatters/)
 * (@optimizingmatters)
 * [3 years, 10 months ago](https://wordpress.org/support/topic/compability-4/#post-15838238)
 * you’re welcome, feel free to [leave a review of the plugin and support here](https://wordpress.org/support/plugin/autoptimize/reviews/#new-post)!
   🙂

Viewing 8 replies - 1 through 8 (of 8 total)

The topic ‘compability’ is closed to new replies.

 * ![](https://ps.w.org/autoptimize/assets/icon-256X256.png?rev=2211608)
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 * 10 replies
 * 3 participants
 * Last reply from: [Optimizing Matters](https://wordpress.org/support/users/optimizingmatters/)
 * Last activity: [3 years, 10 months ago](https://wordpress.org/support/topic/compability-4/#post-15838238)
 * Status: resolved