Why loading a Package is slow (Julia 1.6)

[lmiq]

Check this explanation:

Julia precompilation limits or are there really any?

I’m not an expert on the topic, so others more knowledgeable about the compiler can definitely chime in here. But from my understanding: Currently there will always be some compilation cost on the first call. Precompile directives only save type-inferred code, not native code, so the first time a precompiled method is called the compiler still needs to do some work. However, a major part of compiling time is spent in type inference, so precompilation will still significantly cut package loadin…