Tested a ReaPlugs-heavy project on two macs:
1) C2D 10.6.8 iMac: 31% CPU ICC, 32% CPU Clang
2) i7 10.13.2 mid-2014 RMBP: 7% CPU ICC, 7.5% CPU Clang
Getting an evaluation of a newer ICC to see if it helps things too, but in general those numbers seem to be pretty decent anyway.
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