Interesting performance data-point

[Steven Schveighoffer]

On Tuesday, 31 December 2024 at 15:36:31 UTC, Don Allen wrote:
> As I've mentioned in previous messages, I've ported my personal 
> finance package from C to D, having first ported some of it to 
> Rust until I just couldn't stand it anymore.
>
> One of the utilities that exists in both the D and Rust 
> versions reads .csv files downloaded from American Express and 
> loads the transactions into the Sqlite database that contains 
> my financial data, trying to assign an expense account to each 
> incoming transaction by fuzzy-comparing the transaction's 
> description to existing transactions, using an algorithm based 
> on Levenshtein distance. The Levenshtein calculation is done 
> using a user-defined Sqlite function that is loaded as an 
> extension.
>
> What I've found is that the D version of this utility is about 
> twice as fast (compiled with DMD) as the Rust version to get 
> identical results. While I haven't done detailed enough 
> measurements to explain the performance disparity with 
> certainty, I've done enough to know that both versions spend 
> most of their time in the Levenshtein distance function.

Great read! Yeah, I think the interoperability with C is very 
much a super-power of D.

-Steve