x/text: usage of text/template or html/template disables compiler DCE

[xaurx]

Go version

go 1.24

Output of go env in your module/workspace:

irrelevant

What did you do?

x/text package uses text/template package which disables DCE (dead code elimination) in compiler due to usage of specific reflect methods. This typically executable binary size by 25-30%.

What did you see happen?

Increases executable size

What did you expect to see?

Smaller executable

[seankhliao]

Where specifically? can you show a reproducer?

[gabyhelp]

Related Issues

• x/net/trace: dependency on html/template inhibits dead code elimination #62024

_{(Emoji vote if this was helpful or unhelpful; more detailed feedback welcome in this discussion.)}

[ianlancetaylor]

I don't think there is anything we can do here.

[seankhliao]

Most of x/text's use of template seems to be for codegen
if there's not any complex run time templating, we could consider replacing it with fmt...

[andig]

@seankhliao are these even a problem, given that happens before compile time?

[seankhliao]

That's why I was asking for more information on this issue?

[seankhliao]

the use of html/template in x/net/trace is unfortunate but necessary for its safe operation (rendering html pages).

that is not the same as the use of template in x/text