emit: cache dft & no apply

[yoshuawuyts]

• caches default routes
• removes .apply() calls

A bit more messy, but probably faster

related to #40

[yoshuawuyts]

cc/ @hughsk

[hughsk]

👏 🎉

[yoshuawuyts]

pre patch benchmark

Running 10s test @ http://localhost:1337
  24 threads and 4000 connections
  Thread Stats   Avg      Stdev     Max   +/- Stdev
    Latency   740.99ms  401.90us 741.66ms   56.94%
    Req/Sec    16.76     34.83   166.00     92.68%
  745 requests in 10.11s, 518.43KB read
  Socket errors: connect 3757, read 0, write 0, timeout 673
Requests/sec:     73.70
Transfer/sec:     51.29KB

post patch

Running 10s test @ http://localhost:1337
  24 threads and 4000 connections
  Thread Stats   Avg      Stdev     Max   +/- Stdev
    Latency    40.46ms    5.47ms 171.02ms   82.23%
    Req/Sec   713.56      1.33k    4.98k    87.26%
  56524 requests in 10.10s, 6.95MB read
  Socket errors: connect 3757, read 0, write 0, timeout 0
Requests/sec:   5595.78
Transfer/sec:    704.94KB

[hughsk]

Whoa that's a huge improvement, nice one! 😁

[yoshuawuyts]

haha, not sure benchmarks hold up. I've changed more stuff (can't reproduce). But hey, it's most likely better haha

[yoshuawuyts]

lol, ok it wasn't that. But hey, perf!

[yoshuawuyts]

I ran some other checks, and I don't believe this sped up things by a lot. Perhaps revisit later, but for now it's probably good enough