Language performance benchmark be updated 2019/11/09

[IGotD-]

On Saturday, 16 November 2019 at 16:34:58 UTC, Jacob Shtokolov 
wrote:
> On Saturday, 16 November 2019 at 16:07:29 UTC, Jacob Shtokolov 
> wrote:
>> Haven't tried other tests
>
> Just tried to compile and run Base64
> The results are:
>
> ```
> C:      1.46s, 1.9Mb
> Rust:   1.49s, 2.4Mb
> D LDC2: 1.98s, 4.2Mb
> Golang: 2.89s, 10.9Mb
> C++:    3.18s, 4.8Mb
> ```
>
> This test is closer to the author's numbers, but Rust 
> implementation isn't faster than the C implementation on my 
> machine.
>
> Golang here is faster than C++. The D version was built with 
> bounds checks this time.

Why is C++ doing so badly? Is it because of inefficient usage of 
buffers and that it doesn't natively support slices?