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Here are some tools I’ve found useful:
- debuggers! (most languages have one!)
- profilers:
perf, pprof, py-spy - tracers:
strace, ltrace, ftrace, BPF tools - network spy tools:
tcpdump, wireshark, ngrep, mitmproxy - web automation tools:
selenium, playwright - load testers:
ab, wrk - test frameworks:
pytest, RSpec - linters/static analysis tools:
black, eslint, pyright - data formatting tools:
xd, hexdump, jq, graphviz - dynamic analysis tools:
valgrind, asan, tsan, ubsan - fuzzers/property testing:
hypothesis, quickcheck, Go's fuzzer
(I’ve never used those last two but lots of people say they’re helpful.)