Extend and correct benchmarking about d3-geo-voronoi HOT 2 CLOSED

I have just created a PR based on what I said above

When I talk about a new test based on the generation of a world map from a large json file.

Well none of that code exercises code from this module... so I have cut it out from the PR. Its a valid thing to do but I should create a new PR for that in d3-geo.

What I ended doing instead : -

I duplicated the existing sphere test and altered it so that instead of writing to a SVG element it draws to a CANVAS element.

I have altered both benchmark so they output to the screen the mean render time with a standard deviation based on the last 200 frame draws.

from example of my machine I get for a sphere with 505 points. the following render times.

SVG: 11.452 +/- 2.897ms
CANVAS: 8.805 +/- 3.70ms

So writing to a canvas element apprears to reduce the render time by 24%.

Any there is little more variability in the mean render time that I like ... but I think this is an improvement.

from d3-geo-voronoi.

Didn't mean to close, sorry.

from d3-geo-voronoi.