I have SuiteCRM 7 and 8 installed on the same server. Version 7 is quite snappy. In version 8 I have to wait about a second between each click.
How to speed up the v8?
I’m interested too. Just +1 on this thread.
If anyone is interested I did a SuiteCRM 8 first impression review and walkthrough. I show open times SuiteCRM 7 vs SuiteCRM 8 on listview and also in detailview etc. in a side by side comparison.
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Thanks for the feedback.
@pstevens quite liked the video, thanks for the feedback.
Regarding performance. We already know some improvements we want to make.
Meanwhile, there are some php/server configurations that may help.
For a deeper understanding of what I’m going to say next, you can have a read on the following:
- Performance (Symfony Docs)
- https://api-platform.com/docs/core/performance/#enabling-the-metadata-cache
From the above there a few things you could try, maybe the one with most impact is:
Enabling opcache
Setup and configure opcache on php.ini
The following example is based on the above Symfony documentation:
[opcache]
; Determines if Zend OPCache is enabled
zend_extension=opcache.so
opcache.enable=1
; The OPcache shared memory storage size.
opcache.memory_consumption=256
; The maximum number of keys (scripts) in the OPcache hash table.
; Only numbers between 200 and 100000 are allowed.
opcache.max_accelerated_files=20000
; When disabled, you must reset the OPcache manually or restart the
; webserver for changes to the filesystem to take effect.
opcache.validate_timestamps=0
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Thanks pstevens! Great Review 
I also find that using redis for session caching makes SuiteCRM 8.4.0 faster in many aspects.
(Needless to say, your PHP needs redis support.)
Something like this in php.ini or four FPM pool configuration typically works:
redis.session.locking_enabled=1
redis.session.lock_retries=-1
redis.session.lock_wait_time=10000
session.save_handler = redis
session.save_path = "tcp://127.0.0.1:6379"