Comparition of timing v1.9 vs v1.8 and how to get this precompilation in my own packages?

General Usage
1

Just tested Julia v1.9rc3 and compared the timining to first plot with Julia 1.8 on a terminal under a new temporary project environment:

Command Julia 1.9rc3 Julia 1.8
add Plots 2’ 32’’ 1’ 22’’
using Plots 3’’ 6’’
plot (x->x^2) 1’’ 7’’

Is this heavy precompilation coming automatically or does it need to be somehow enabled in the package ? How to do it while maintaining compatibility with pre-1.9 Julia versions ?

2

it should be done once. 1.9 saves more precompiled code

3

In general, yes, using PrecompileTools.jl

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4

yep, just tried on my unmodified package, julia 1.9 is about twice as fast to run the first call to my functions, but not 7 times faster as in Plots.jl… going to look, thanks…

5

Yes, getting a fast runtime performance also often requires fixing invalidations that might exist in a package (see Snooping on and fixing invalidations: @snoopr · SnoopCompile), as well as improving type-inference by avoiding code patterns such as recursions involving changing types, which seems to trip the compiler

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