introspect: add "R" for rectangle, "C" for circle, etc.

[timholy]

I'm hoping this will be helpful as I dig into the architecture.

I can't distinguish vcenter, vtop, and vbottom, is this a bug?

[dcjones]

Thanks, this looks nice.

Vertical alignment works for me on PNG and SVG, but it could be at the whims of the browser for SVG or cairo's ability to compute text sizes for cairo backends.

If you're digging into the architecture, you should maybe take a look at the measures branch, which is work that @shashi and I did that simplifies and speeds things up quite a bit. I'm waiting to 0.4 to be released to merge it, because it assumes efficient tuples.

[shashi]

I wonder if JuliaLang/julia#11187 thwarts our plans though

[dcjones]

You're worried that passing all tuples by reference will wipe out any performance improvement?

[shashi]

Yeah, could make it worse. But I haven't seen the numbers yet.

[dcjones]

@shashi I benchmarked an order-11 sierpinski triangle on measures.

On julia master:
2.526038 seconds (9.21 M allocations: 366.310 MB, 2.12% gc time)

One commit before JuliaLang/julia@f2cce89
2.273112 seconds (9.21 M allocations: 366.310 MB, 1.98% gc time)

So it is slower, but not dramatically. Compare this to master:

julia master:
8.549056 seconds (36.14 M allocations: 983.982 MB, 1.75% gc time)

JuliaLang/julia@f2cce89 ~ 1
7.724505 seconds (36.14 M allocations: 983.982 MB, 1.24% gc time)

[shashi]

Nice! The change doesn't matter much at all. And whoa 9.21M allocations.

[dcjones]

Yeah, that seems a little crazy: 9.21e6 / 3^11 -> 52 allocations per triangle drawn! Clearly there's some more room for improvement.