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What is the fastest way for cleaning a map in Go?

for k := range m { delete(m, k) } should work fine. It will probably be faster to create a new (correctly sized, if you know it) map, but reusing can put less pressure on the garbage collector. (Rob Pike)1

  1. Pike, Rob. “what’s the fastest way for clearing a map” (2016, August 3). golang-nuts Newsgroup. https://groups.google.com/g/golang-nuts/c/UvUm3LA1u8g ↩

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