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Faster random numbers - #1103

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jpn-- wants to merge 44 commits into

ActivitySim:mainfrom

driftlesslabs:reroll

Commits on Aug 8, 2026
- merge reroll
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  318ab72
- add fast channel test
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  496fd26
- configurable RNG channel type
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  94fda02
- remove extra gitignores
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  a08b9d8
- change default from fast to simple
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  7ed8fff
- reseed only when needed
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  66d0540
- SFC64 with quick entropy
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  1275cf0
- reseed in tests
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  235e929
- update test targets
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  78a9116
- fix tests
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  aa0fbde
- add a script to demonstrate random runtime performance gains
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  2ee22df
- fix test targets
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  44f8ced
- performance check script
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  636c0b2
- action to run performance checks
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  84767ca
- temporary push trigger
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  b315358
- updates for push
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  3a1cf68
- make it run on windows
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  bcbdc25
- add os to artifact filename
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  52adc1f
- use fold-in style reseeding
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  657bf78
- update test targets for faster seeds
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  ac30986
- update test targets
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  acd48b0
- Add complete fast-channel choice API
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  bb18f29
- Support RNG offset resets in fast channels
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  02155de
- Preserve normal draw shape compatibility
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  c016b1e
- Declare cffi as a runtime dependency
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  fecc87c
- Preserve destination logsum regression coverage
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  f44ea6b
- Make performance checks opt-in
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  61f5b9d
- Align RNG defaults and benchmark documentation
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  763a8a0
Commits on Aug 9, 2026
- Fix quick PCG64 state initialization
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  bbb9423
- Document random channel configuration
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  36d429c
- Validate quick entropy streams
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  6b1c5f1
- Freeze fast RNG reproducibility contract
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  9061aa7
- Correct and expand RNG benchmarks
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  5eb3cb6
- address broadcasting concern
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  1e29011
- improved docs on randomness
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  bcce455
Commits on Aug 19, 2026
- Merge branch 'ActivitySim:main' into reroll
  jpn--
  authored
  bbeb31f
- faster gumbel draw
  
  dhensle
  authored and
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  committed
  06fcddc
- faster skim lookup
  
  dhensle
  authored and
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  9f0bc56
- Expand random channel performance benchmarks
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  88a11b1
Commits on Sep 9, 2026
- Bound fast-channel EET temporary memory
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  2d9e34a
- Preserve RNG streams for zero-size draws
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  ed4f3c3
- Validate fast-channel choice inputs before drawing
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  72902ca
Commits on Sep 18, 2026
- Rename RNG channels to legacy, pcg64, and sfc64_hash
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  committed
  4e1cced
Commits on Oct 8, 2026
- Merge branch 'main' into reroll
  jpn--
  committed
  6155056

Commits

Commits on Aug 8, 2026

Commits on Aug 9, 2026

Commits on Aug 19, 2026

Commits on Sep 9, 2026

Commits on Sep 18, 2026

Commits on Oct 8, 2026