Re: [DISCUSS] Introducing Rust into the Git project

[Dragan Simic <dsimic@manjaro.org>]

On 2024-01-11 01:33, Elijah Newren wrote:
> On Wed, Jan 10, 2024 at 1:57 PM Dragan Simic <dsimic@manjaro.org> 
> wrote:
>> 
>> Thus, Git should probably follow the same approach of not converting 
>> the
>> already existing code
> 
> I disagree with this.  I saw significant performance improvements
> through converting some existing Git code to Rust.  Granted, it was
> only a small amount of code, but the performance benefits I saw
> suggested we'd see more by also doing similar conversions elsewhere.
> (Note that I kept the old C code and then conditionally compiled
> either Rust or C versions of what I was converting.)

Well, it's also possible that improving the old C code could also result 
in some performance improvements.  Thus, quite frankly, I don't see that 
as a valid argument to rewrite some existing C code in Rust.

> Further, I found a really old bug from this effort as well[1], and I
> find it extremely unlikely that I would have found that bug otherwise.
> So, converting to Rust can even improve our existing C code.
> 
>> , but frankly, I don't see what would actually be
>> the "new leafs" written in Rust.
> 
> In addition to some of the examples Junio mentioned elsewhere, I think
> new toplevel commands, like git-replay, would qualify.
> 
> 
> [1] Yeah, I really need to dig the patch out and send it in.  I'll do
> so shortly.