GoKawiilBenchmark finds WSL3 outperforms WSL2 by up to 61% on memory tasks
An independent benchmark comparing Microsoft's WSL 2.6.3.0 (Linux kernel 6.6.87.2) against the newer WSL 3.0.2.0 (kernel 6.18.40.1) found measurable gains across syscall throughput, scheduler latency, and memory bandwidth. The tests, run on an Alpine Linux 3.23.0 guest with Go 1.27.1 on an Intel i5-8500T host, showed improvements ranging from about 4% on basic syscalls to over 61% on sequential memory copy bandwidth, with context-switch latency dropping roughly 11%.