When a window (renderer process) is unresponsive the devtools might be unable to collect the required cpu profile. A reliable way to profile in such cases is with the tracing infra using the steps ...
A fully functional 6502 microprocessor emulator written entirely in PHP, packaged as a Composer library for building custom 6502-based systems. Features two CPU cores (NMOS 6502 and WDC 65C02) that ...