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Add note that FTL will run much slower in valgrind

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Signed-off-by: DL6ER <dl6er@dl6er.de>
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DL6ER
2024-11-15 18:41:06 +01:00
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docs/ftldns/valgrind.md
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Occasionally, debugging may require us to run `pihole-FTL` in `valgrind`. We also use it to measure performance and check that our memory layout is optimal (= minimal footprint).
`Valgrind` is a flexible program for debugging and profiling Linux executables. It consists of a core, which provides a synthetic CPU in software, and a series of debugging and profiling tools.
`Valgrind` is a flexible program for debugging and profiling Linux executables. It consists of a core, which provides a synthetic CPU in software, and a series of debugging and profiling tools. The use of a synthetic CPU allows Valgrind to run the client program in a completely controlled environment and, hence, track the behaviour of the program in a very detailed way. Unfortunately, this also means that the program runs *much* slower than usual.
## `memcheck`