get execution time and memory usage of each plugin programatically - wordpress

I want to get each WordPress plugin execution time and memory usage by it. I have gone through WordPress documentation and google search but I am getting code regarding complete page but not specific plugin.
Following codes, I have found
$wpdb->queries
echo get_num_queries();
timer_stop(1);
Can anyone guide me how I can get execution time and memory usage for specific plugin only?

Already exists plugin Debug Bar and another plugin (addon for that) you will need: Debug Bar-Slow Actions.
then you will get such results:

Another plugin I can recommend is P3 (Plugin Performance Profiler):
https://wordpress.org/plugins/p3-profiler/

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post.php wordpress load much slow

My Wordpress website is going very slow, loading of admin dashboard take much time ,
when I have checked the network tab I have found that post.php load take more than 40s
How can I figure out how to resolve this issue?
Thanks in advance.
You can check which API calls and SQL Queries effects the load by using plugin like Query_Monior (or) you can check which plugins effect the loading speed of your site by checking the URL in plugin like Code_Profiler. Depending on what you found you can choose where to fix. If only on post.php, check your screen option if pagination is many. Hope it help.

woocommerce checkout page keeps loading

When I try to checkout the purchase it keeps loading all the day. I've checked the console but there is no error. I don't know what's causing this. here is the website link. I'm new to woocommerce. Kindly help to resolve this.
It's possible that the loading problem is due to a theme or woocommerce.
To figure out what's wrong, allow debugging in WordPress and look at the debug log to see what's wrong.
To enable debugging in WordPress, go to this link. = https://wordpress.org/support/article/debugging-in-wordpress/
Then disable your all plugins excluding woocommerceand then check error is occurred or not, if loading is stoped then enable one by one all plugins and check which one is faulty for this error..
Just add this in Appearance > Customize > Additional CSS
.blockOverlay{
display: none!important;
}
This occurs due to many reasons just you can resolve by
Sol1: AJAX error due to WordPress settings
The URL’s in Settings > General need to match – this is because AJAX requests don’t work across different domains
Sol2: WP Memory Limit
We recommend at least 64MB. See: Increasing the WP Memory Limit

wordpress Request 404/410 responses missing fonts

I try to fix the website speed for that I visit gtmetrix to check the exact speed and errors from last seven days one error continuously display there its called web fonts, even I try a lot but still didn't find the proper way to resolve this issue.
I tried turning off plugin one-by-one, but that didn't make any difference, so I know it's not a plugin conflict. I'm looking at the font files on the server, so I know they are there. Any ideas what to try next?
Currently, i am using Fetch Wordpress Theme its free, for reference, I provide the web page test result link please advise.
This Issue Happen Because of the Usage Of Plugin Wp-Hide, Once You Use The Plugin Very Carefully Because If You Mis Configure The Page Speed & Web Page Score Effected.

Wordpress unknow request slowing down my website

I am optimizing a wordpress site using woocommerce plugin.
All seems fine except one unknown request reported by gtmetrix.
It seems that this variable is being appended on every url on my site:
?resource=cart
This specific request takes 2 to 3 seconds to load
and here is the response:
{"cart":{"token":"","item_count":0,"total_price":0,"items":[]}}
Any ideas how to disable this?
Perfect! I advise you to disable all the plugins and reactivate one by one to figure out which to be the error on your site.
30 Plugins are many, and therefore they can try various contrasts between them, between the version of Wordpress and the version of Woocommerce.
After finding the wrong plugin, you can contact the developer to report the bug and have it updated.
Otherwise you will have to delete it and implement the PHP code yourself.

How to find out what process is using wp_mail?

While enabling Sendgrid plugin I get such a message:
SendGrid: wp_mail has been declared by another process or plugin
An interesting thing is that I disable all plugins and enabling this plugin I still get this error. Is it possible to see what kind of process is using wp_mail?
Refer below scenario,
1. Maybe plugin not supported your WP version.
2. This plugin may used WP core class or function because of that this second time declaration error may occur.

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