This is less an argument for a rewrite than an argument for redesigning parts of your codebase, which can be done much more easily than a complete rewrite.
The tricky thing is that it’s easy to end up with a result that’s not far off. Some modules will improve, but a lot of the time these kind of bottlenecks tend to happen because the performant version is not very idiomatic (feels weird), it’s too verbose, or it’s to confusing to think through.
Unless you have the same team (and they learned the lesson the first time), it’s very likely to end up with modules that perform in a similar way.
Sometimes changing the language makes thinking about the problems easier.
Unless you have the same team (and they learned the lesson the first time), it’s very likely to end up with modules that perform in a similar way.
Sometimes changing the language makes thinking about the problems easier.