Hi, Julia Community! I am trying to wrap my head around this one: Functions like similar and copy seem to make 2 allocations if the array is sufficiently large. Can you help me understand why? julia> using BenchmarkTools julia> a, b = rand(100), rand(10000); julia> @btime similar($a) 35.473 ns…

There is slightly different treatment of memory smaller and larger than 2048: JuliaLang/julia/blob/0e6d7972c62eb1dedaf00ea9b966a0060e2effb8/src/genericmemory.c#L51C4-L64C1 int pooled = tot <= GC_MAX_SZCLASS; if (!pooled) { data = (char*)jl_gc…

Why do functions like similar and copy make 2 allocations for large arrays?

New to Julia

gdalle July 19, 2024, 7:44am 3

Which Julia version are you on? The Memory changes of 1.11 are known to cause this behavior