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kotlinlang

Hey guys, just wanted to know if there is any java/kotlin dead code elimination library?
I am generating java &amp; kotlin source files and wanted to remove unused imports or functions from the source files.

It doesn’t look as ded code elimination, it’s more like lint tool

also, why do you add unused imports to generated files?

I have to do too many checks for imports during generation

So I am thinking of adding all imports at time of generation and remove those in post

To do that you need some tool like ktlint that detects unused imports

But it doesn’t sound for me as easier solution

do you use KotlinPoet for code generation?

Its an old project and I can't migrate to kotlin poet

Why then you worry about unused imports? %)

Doesn't it affects performance if we have unused imports

Because imports is source code abstraction which doesnt’ exist in bytecode

Anyways I was curious as there is DCE in Kotlin/JS so is there a similar java counterpart

and running code formatter for generated code is bigger performance problem than unused imports for compiler

I mean it will be a part of genration only

import is just import, it doesn’t exist after compilation

But the generated project will not have those redundant imports and functions

Yes. better to avoid it just to have better code generation

but add lint check and regenerate file tthat was just generated a few milliseconds ago doesn’t sound as perfromance optimization

For example dagger did this after code generation, just to reformat code and it disabled because of visible performance penalty, so they just generate properly formatted code now
<https://github.com/google/dagger/issues/368>

&gt;Yes. better to avoid it just to have better code generation
I just mean, that if I use some code generation, I would like to have good generated code: formatted, with imports, no dead code etc
But would I like to pay for this by longer code generation? Not really