You're right, of course. Thanks.
So is it true that package level initializations (that are used) require no
runtime, other than some loader
time to set up?
Jon
On Wednesday, October 27, 2021 at 3:54:08 PM UTC-7 Ian Lance Taylor wrote:
> On Wed, Oct 27, 2021 at 3:34 PM jlfo...@berkeley.edu
> <jlfo...@berkeley.edu> wrote:
> >
> > I'm asking because preinitializing an executable binary, where possible,
> seems like an obvious optimization.
> > I'm writing baby programs as I'm learning Go, but even they have a
> significant (to me) number of initializations
> > that don't need to take up any execution time. On the other hand, modern
> computers are so fast maybe it's not
> > even worth paying attention to such things.
> >
> > I'm not an expert but I don't think the example you showed says anything
> about preinitialized data. For example,
> > I built the following trivial program:
> >
> > package main
> >
> > var x = []int {1,2,3,4,5,6,7,8}
> > var s string = "abcdefg"
> > var p float64 = 3.1415
> >
> > func main() {
> > }
> >
> > and then ran nm on the executable. I didn't see any sign of any of the
> constants in my program. But,
> > maybe I don't know what to look for. Your example shows data, but not
> initialized data. Please
> > correct me.
>
> The constants won't be in that program because nothing refers to them,
> so the compiler will discard them.
>
> Try a program where the constants are actually used. For example,
> print them out.
>
> Ian
>
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