So I have been going through some data sheets today trying to pick out a crystal and a few caps for my atmega328 project. I have found a lot of threads on how to calculate the values of the capacitors but no one talks about the bennies of a well timed mcu. Most people are even adamant that it isn't important noting the 20% tolerance of capacitors. They usually use the 22pf caps because its a standard value close to one needed.
I was wondering if there any benefits to getting super close? My project uses a lot of communication through icsp and i2c. 8 to 10 nodes communicating wireless (nrf24l01 over icsp) with two nodes communicating through i2c and a webserver to boot. Would I see any performance increase from picking out tighter tolerance capacitors of the right value?
Odd values of caps dont seem to cost any more than standard values so I could care less if they aren't easy to find TBH. I also think I know someone with a high precision frequency counter so I can actually nail down the values on my particular PCB.