1BRC Dart Single Core

[HankG]

I tried my hand at doing this in Dart, my preferred language. On my machine the standard Java implementation ran in about 2 minutes 14 seconds.

The naive Dart implementation not using immutable objects ran in 6 minutes 50 seconds, or about 300% slower:
https://gitlab.com/HankG/1brc/-/blob/6742515ff1c5702c0534ff2b72f418a2d8adc826/bin/onebrc.dart

The as many stops out as I could think of version runs in 2 minutes 43 seconds, so about 22% slower:
https://gitlab.com/HankG/1brc/-/blob/6742515ff1c5702c0534ff2b72f418a2d8adc826/bin/onebrc.dart

A concurrency example using Dart Isolates I started dabbling with but didn't have anything worth showing for it. The nature of Isolates/Workers model over a more traditional multithreading model makes that more difficult for me to get my head around how I'd get performance out of it.

[sanathusk]

@HankG I think we can optimize this further, i have a PR for the same please merge the same if you agree with improvements https://gitlab.com/HankG/1brc/-/merge_requests/1

This implementation completes under 2 seconds (~1.17 seconds) on my machine
real 0m1.171s
user 0m0.239s
sys 0m0.044s

[AlexanderYastrebov]

I think using sorted map may slowdown things but the code should be certainly pre-compiled like you suggest 👍