This is just a typed version of these notes, generated during perf discussions on summer of 2023. Can be used as a reference point.

Comparisons

OCaml
Scala
C#
Rust

Underlying problems

LOH allocations
Build does too much for deltas
GC Gen 2

Major problems

Script start up CLI
Build on Linux & Mac
Glitches in test discovery
Edit & test workflow
Edit & run workflow
Edit & check workflow
Unnecessary rebuilds

Hosted compiler problems

Stamp overflow
Non-deterministic
Memory leaks
Infinite loops
Stay resident compiler
Permission elevation

Minor problems

Benchmarking
Squigglies
Colorization
Debug
Press dot

Incremental phases

Incremental parsing file
Incremental checking file
Incremental optimization for deltas
Cascading DLL builds
Incremental DLL builds
Incremental ILxGen for deltas
Incremental assembly generation
Incremental PDB generation for deltas

Community guidelines

Community leadership
Community enablement for tool performance
Performance acceptance criteria
Performance running
Docs for tooling performance