stuttering begins it's almost impossible to work.
I've tried to change the buffer size and tried to freeze the tracks and what not, but i haven't found the issue yet.
When i clean my session and bounce everything to audio it works just fine, but i can not understand that how can it be so hard
to work with bigger projects on Ableton? I don't always want to bounce everything to audio, it would be nice to have the option to leave the Software Synths editable.
I just bought a new macbook a year ago so that should not be the problem.
Do you know any tricks on finding the problem and the CPU eater

I use pretty common plug-ins, like Waves (rvox, cla76, cla vocals, soundshifter), Antares autotune, melodyne, XLN Retrocolor, Volumeshaper, Valhalla etc.
Synths like Kontakt, Serum, Massive, Keyscape. I sample a lot too and create new instruments with simpler.
One thing that i've done differently past months is that I made a template project, but it's pretty basic: 8-10 sends, plug-ins like Valhalla Vintage Verb, 3 soundshifters, echoboy, fabfilter timeless, PSP n20. Nothing special.
I'm using:
Ableton Live 9.7.5
MacBook Pro (15-inch, 2016)
16 GB 2133 MHz LPDDR3
2,9 GHz Intel Core i7
Os X 10.12.13