cPanel optimization for faster sites?

hey guys, just pushed a new feature for our app and we're noticing some site slowness. i'm really struggling with cPanel optimization, especially when it comes to server resource usage and overall loading times. it's making our routine website maintenance alot of a headache.

any quick wins or common configuration mistakes people often make that cause these kinds of issues? we're seeing spikes like this when traffic hits:

top - 09:30:01 up 1 day, 2:34,  1 user,  load average: 1.25, 1.10, 0.95
Tasks: 120 total,   2 running, 118 sleeping,   0 stopped,   0 zombie
%Cpu(s):  5.3 us,  2.1 sy,  0.0 ni, 92.6 id,  0.0 wa,  0.0 hi,  0.0 si,  0.0 st
MiB Mem :   7987.0 total,   2345.0 free,   3456.0 used,   2186.0 buff/cache
MiB Swap:   2048.0 total,   2048.0 free,      0.0 used.   4123.0 avail Mem

  PID USER      PR  NI    VIRT    RES    SHR S  %CPU  %MEM     TIME+ COMMAND
12345 user      20   0  1.2g 120m  45m S  15.0   1.5   0:12.34 php-fpm
12346 user      20   0  1.1g 110m  40m S  12.0   1.4   0:10.56 php-fpm

thanks in advance!