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

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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