ETW (Event Tracing for Windows)
Also searched as: etw · event tracing · event tracing for windows
What it means
A built-in Windows system that lets tools listen to a live stream of low-level events — frames being presented, drivers firing, and so on. It's the legitimate, no-injection way to measure what a PC is doing.
More detail
Because it reads events Windows already broadcasts, it doesn't touch game memory, so it's anti-cheat-safe. Compy uses it to measure your real frame rate and frametimes without injecting into anything. …
In the Blackbook
The deeper explanation continues inside the app. The Blackbook publishes its verdicts here — the full write-ups stay in the book, on your rig, next to your own measurements.
The Compy Blackbook holds 191 graded entries like this one, judged against your hardware — and every change it does make is reversible, with the receipt to prove it.
See Compy →