For example, at Oculus they ran both performance benchmarks in a lab and collected feedback data from field telemetry. Now of course, it’s always possible some performance counter was overlooked / the degradation requires a specific workload to show, but the lack of ability to show any evidence of a difference implies that you probably are unlikely to see it given that the detractors were very vocal and engineering at big corps tends to be more stasis driven.

I saw this also repeated at Apple (not Zswap since not Linux, but similar idea of compressing pages) and Android.