test(list): Added benchmarks

[Valentin271]

I added benchmarks for the list widget :

• Render
• Render half scrolled

Chose 16284 as the highest number of lines so we can see the three tests on the graph.

I tried benchmarking the new operation but I think it is not necessary as it only involves copying/moving.

---

Some benchmarks

Figure 1: Render time relative to number of lines

Figure 2: Halfway scrolled render time relative to number of lines

Figure 3: Render vs halfway scrolled render

The number of lines impact the performances (probably because of memory usage?) but where the list is rendered (the offset) doesn't seem to.

---

Relates to #137

[codecov]

Codecov Report

Merging #377 (caccb42) into main (e18393d) will not change coverage.
Report is 4 commits behind head on main.
The diff coverage is n/a.

@@           Coverage Diff           @@
##             main     #377   +/-   ##
=======================================
  Coverage   84.99%   84.99%           
=======================================
  Files          40       40           
  Lines        8686     8686           
=======================================
  Hits         7383     7383           
  Misses       1303     1303           

see 1 file with indirect coverage changes

[joshka]

LGTM - thanks again

[kdheepak]

Thanks for the PR! This is great.