Don't do stack squeezing during context switches in single-threaded programs to guarantee determinism in allocations
As #4450 (closed) and #8611 (closed) show, stack squeezing in the RTS makes allocation numbers between two different runs of the same binary non-deterministic, because its effect is depending on when context switches are bound to happen.
A short-term solution might be to deactivate stack squeezing for vulnerable benchmarks with
+RTS -V0 like in D5460, but IMO a more elegant solution would be to only deactivate stack squeezing in
threadPause calls that happen due to context switches. Would you agree?