serious perf issues on master

[jerch]

Master currently has serious perf issues (comparing ls -lR /usr on my machine, all with webgl renderer):

• master
  

• version 5.0
  

• version 4.19
  

All were measured after several runs to give JIT a chance to do its work. It seems the change causing this happened after 5.0.0.

[Tyriar]

Can repro, runtime is similar on my machine but there's a lot more scripting time on master. Looking into it

---

First run after reload:

5.0.0 (checked out tag)

master

---

Second after reload (JIT done, buffer full):

5.0.0 (checked out tag)

master

[Tyriar]

5.0.0

master

[Tyriar]

The microtask change is causing the buffer to get flushed immediately, so that happens multiple times per frame instead of batching.

[Tyriar]

Will see if we can get the best of both worlds; microtask when there's little data to possibly improve input latency, otherwise timeout