Dev.to daily challenge Duplicate Encoder

[CraigDillabaugh]

On Wednesday, 24 June 2020 at 17:21:34 UTC, Jesse Phillips wrote:
> The Dev.to community does a Daily Challenge[1]. I didn't really 
> set out to solve the  problem and instead took the top 
> implementations done in different languages and implemented 
> them in D[2].
>
> I need to emphasize I reference languages but this is not 
> performance of those languages all data is from D. Also I did 
> not play too much with optimizations on the compiler (using 
> LDC) but feel free to recommend a change.
>
> I find the changes to Haskell's performance to be interesting 
> as it went from very unreasonable to competing with Go (Ranges 
> vs foreach)
>
> This was just a fun little experiment.
>
> 1. 
> https://dev.to/thepracticaldev/daily-challenge-259-duplicate-encoder-2e8l
> 2. 
> https://github.com/JesseKPhillips/devto-challenge259-dupencoder

Neat. It would be nice if the axes in your images were labeled. 
It is not immediately clear what the numbers mean.