Reading peak difficulty reduction - #38427

Draft

piiidosu wants to merge 128 commits into

piiidosu:reading-peak-difficulty-reduction

Commits on Nov 29, 2025

Remove drain rate attribute (#35817)
Givikap120
authored
1b230b3

Commits on Dec 13, 2025

Skip score-based miss count estimation for ScoreV2 (#35962)
Givikap120
authored
346461f

Commits on Dec 18, 2025

Use `DifficultyCalculationUtils.Norm` (#36064)
stanriders
authored
16c1adf

Commits on Dec 19, 2025

Simplify osu! star rating calculations (#36063)
stanriders
authored
99daec3

Commits on Dec 22, 2025

Uses real distance in speed instead of mishandling variables (#35387)

Finadoggie
and
stanriders
authored
90e820b
change FL calc depending on HD settings (#33019)

Givikap120
and
stanriders
authored
906df15

Commits on Dec 23, 2025

Commits on Dec 28, 2025

Extend `Skill` to include `ObjectDifficulties` (#36152)
stanriders
authored
a07d7ad
Add `HarmonicSkill` (#36153)
tsunyoku
authored
c644172

Commits on Dec 29, 2025

Change the doubletapness scaling to be more punishing on the low end of the hitwindow (#36148)
stanriders
authored
dd26162

Commits on Jan 3, 2026

Improve fullcombo threshold formula (#35724)

Givikap120
and
stanriders
authored
bcaf35d

Commits on Jan 17, 2026

Fix legacy score base multiplier being calculated using modded difficulty values (#36209)
tsunyoku
authored
7fc24c6

Commits on Jan 18, 2026

Add comment for wiggle bonus multiplier (#36373)

kwotaq
and
stanriders
authored
cda52cd

Commits on Jan 22, 2026

Move strain's influence in the difficulty of a note based on deltaTime to the evaluator level (#36417)
Natelytle
authored
2876ceb

Commits on Jan 24, 2026

Replace Speed skill strain summation with a per-note harmonic sum (#34696)

kwotaq
and
tsunyoku
authored
520173e
Improve angle calculation to better represent the path taken on sliders (#35555)

authored
fb8d198
Use correct object for the aim slider bonus (#36216)

stanriders
and
tsunyoku
authored
c25820a

Commits on Jan 25, 2026

Replace current AR and HD bonuses with a new Reading skill on the osu! ruleset (#33196)

authored
562f1f8
Move speed distance bonus to aim (#36168)

stanriders
and
tsunyoku
authored
0afcebe

Commits on Jan 26, 2026

Move TD difficulty reduction to Aim (#36476)
stanriders
authored
02b76db
Use deviation-based Speed accuracy scaling (#36475)

stanriders
and
tsunyoku
authored
ae43d3e
Make reading and flashlight pp to be LP summed (#36464)

Givikap120
and
tsunyoku
authored
ea87e82

Commits on Jan 27, 2026

Make sliderless aim in fact sliderless (#29993)

authored
aefe31d

Commits on Jan 29, 2026

Commits on Jan 30, 2026

Adjust speed deviation scaling to be more harsh on low end (#36554)
Givikap120
authored
e9974ba

Commits on Jan 31, 2026

Nerf aim strain for objects <radius (#36558)
tsunyoku
authored
355addc

Commits on Feb 1, 2026

Simplify hidden difficulty calculation (#36465)
Givikap120
authored
ee0ac3e

Commits on Feb 4, 2026

Commits on Feb 5, 2026

Add real sliderend check in rhythm (#36593)
stanriders
authored
4eec06c

Commits on Feb 8, 2026

Commits on Feb 10, 2026

Add early returns in `HarmonicSkill` and `OsuDifficultyCalculator` (#36644)
stanriders
authored
25d2c04
Nerf HD perfect stack reward (#36623)

Givikap120
and
stanriders
authored
3a46319
Refactor `DifficultyHitObject` to include `ClockRate` and `HitWindows` (#36630)

stanriders
and
tsunyoku
authored
c8318d6

Commits on Feb 14, 2026

Change accuracy pp to be uncapped (#36669)
stanriders
authored
a166d00

Commits on Feb 15, 2026

Adjust wide angle bonus to be closer to SpeedAim distance scaling (#36670)
stanriders
authored
62fdd42

Commits on Feb 18, 2026

Adjust RX-related multipliers (#36697)
stanriders
authored
de50789
Fix Aim's `skillMultiplierTotal` being applied incorrectly (#36699)

stanriders
and
tsunyoku
authored
716cd8d

Commits on Feb 22, 2026

Q1 2026 osu! Balancing pass (#36734)
stanriders
authored
a14e87f

Commits on Feb 26, 2026

Use full hitwindow in taiko Rhythm skill (#36671)
stanriders
authored
2d6fa65

Commits on Mar 2, 2026

Fix combined slider velocity calculation (#36773)
stanriders
authored
f241d9c
Aim strain influence reduction (#36792)

stanriders
and
tsunyoku
authored
b1227e1

Commits on Mar 4, 2026

Reduce strain influence a bit more (#36813)
stanriders
authored
020e6fa

Commits on Mar 5, 2026

Adjust wide aim bonus cutoff after SpeedAim changes (#36835)
stanriders
authored
b945e2e

Commits on Mar 6, 2026

Slightly increase TD penalty (#36855)
stanriders
authored
ab2c91e
Increase high cs bonus in SpeedAim (#36856)
stanriders
authored
8efb10d

Commits on Mar 9, 2026

Add basic flow evaluation (#36902)
stanriders
authored
c2e9b05
Penalize angle repetition depending on the difference between vectors (#36559)

kwotaq
and
stanriders
authored
f3d97c0

Commits on Mar 10, 2026

Commits on Mar 11, 2026

Remove `OsuStrainUtils` (#36924)
tsunyoku
authored
b0ee82d

Commits on Mar 12, 2026

Use current object's `Preempt` when retrieving past visible objects in osu! reading difficulty (#36944)
Rian8337
authored
1e01001

Commits on Mar 16, 2026

Restore precision buff in Agility (#36968)
stanriders
authored
5b8067a
Merge branch 'master' into pp-dev
smoogipoo
committed
00c017e
Apply a few minor fixes to flow aim evaluation (#36999)

tsunyoku
and
stanriders
authored
abf1a00
Remove slider velocity considerations from previous object velocity (#36806)

stanriders
and
tsunyoku
authored
fc82dac
Adjust Aim RX multiplier (#36985)

stanriders
and
tsunyoku
authored
09bcef1
Calculate clock time when creating difficulty hit objects (#36962)

stanriders
and
tsunyoku
authored
fadb1c3
Change the aim scaling slightly (#36967)

stanriders
and
tsunyoku
authored
b538c1d

Commits on Mar 22, 2026

Make miss penalty slightly harsher on first misses (#37040)
stanriders
authored
c7eeccc

Commits on Mar 24, 2026

Undo Agility strain influence rescaling (#37081)
stanriders
authored
22ac12c

Commits on Mar 25, 2026

Adjust high CS bonuses after all the distance-time rescaling (#37088)
stanriders
authored
0071c82
Increase Aim strain decay base (#37099)

stanriders
and
tsunyoku
authored
0f37874

Commits on Mar 26, 2026

Account for alternating angles in reading angle factor (#36466)
Givikap120
authored
b31d1b3

Commits on Mar 27, 2026

Use variable-length strains to fix chunking-related issues (#33351)

authored
b0047e4
Very slight overall aim buff (#37134)
stanriders
authored
4ce4bca

Commits on Mar 29, 2026

Aim balancing (#37147)
stanriders
authored
e082550
Refactor Reading strain to match the rest of the skills (#37010)

kwotaq
and
stanriders
authored
c4ef081

Commits on Apr 3, 2026

Move Aim mod-related difficulty adjustments to after the probability calculation (#37184)
stanriders
authored
f6223d1

Commits on Apr 12, 2026

Refactor SnapAimEvaluator bonuses for better readability (#37119)

kwotaq
and
tsunyoku
authored
5049ac8

Commits on Apr 13, 2026

Fix snap angle repetition (#37286)
stanriders
authored
b20b367

Commits on Apr 15, 2026

Fix low distance snap/flow relation (#37306)
stanriders
authored
a057138

Commits on Apr 16, 2026

Rebalance TC Bonus (#36555)
piiidosu
authored
5aff5a4

Commits on Apr 20, 2026

Rescale wide snap aim bonus (#37411)
stanriders
authored
f204781

Commits on Apr 21, 2026

Use Mehs in the okAdjustment (#37264)

authored
af9f9e7
Remove flow acute bonus velocity sqrt (#37436)

stanriders
and
tsunyoku
authored
a8628fd

Commits on Apr 23, 2026

Nerf linear spacings in osu!catch (#37287)

wulpine
and
tsunyoku
authored
8d079a6

Commits on Apr 24, 2026

Standardize difficulty variable naming (#37460)

Natelytle
and
stanriders
authored
5b073e6

Commits on May 4, 2026

Move mod-based difficulty adjustments to skills (#37621)
stanriders
authored
b30f10f
Another batch of small rhythm evaluation fixes (#37609)

stanriders
and
tsunyoku
authored
bf405fb

Commits on May 6, 2026

Add distance factor to anti-doubletap (#37636)

Givikap120
and
stanriders
authored
5a801e2
Remove accuracy bonus when flashlight is enabled (#36900)

molneya
and
stanriders
authored
2b1d4aa
Make Ok adjustment formula more stable (#37263)

authored
d18edb5
Refactor aim/speed sliderbreak estimation calculation calls (#37654)
stanriders
authored
c587106

Commits on May 13, 2026

osu!taiko penalty for frequent rhythm changes with long gaps (#37200)

authored
a84f5a7

Commits on May 18, 2026

Merge branch 'master' into pp-dev
smoogipoo
committed
c0c952e

Commits on May 19, 2026

Commits on May 20, 2026

Update difficulty calculation tests (#37829)
tsunyoku
authored
6aaa10c

Commits on Jun 15, 2026

Merge branch 'master' into pp-dev
peppy
committed
555c099
Use constant difficulty for single-note rhythm islands (#38082)
stanriders
authored
017f57b

Commits on Jun 22, 2026

Merge branch 'master' into pp-dev
peppy
authored
c81c5b8

Commits on Jun 25, 2026

Remove storage of epsilon per island
peppy
committed
149bf92
Fix incorrect null checks
peppy
committed
af2b163
Fix incorrectly defined constants
peppy
committed
7be8348
Refactor `CalculateNestedScorePerObject` to avoid array storage and multiple iterations
peppy
committed
3a0d78a
Initial tidy pass of `RhythmEvaluator`
peppy
committed
06577a2
Pre-allocate `DifficultyHitObject`s list length of known length
peppy
committed
c90e246

Commits on Jun 26, 2026

Commits on Jun 28, 2026

Attempt to fix xmldoc references
peppy
committed
22e5cbf
Remove unnecessary `virtual` usage
peppy
committed
4d5b268
Avoid one final list copy
peppy
committed
26c38a5
Use more efficient `Math.Pow` when exponent is an integer
peppy
committed
4bc6a97
Simple LINQ free optimisation to `Norm()`
peppy
committed
0413705
Avoid duplicating list when not required (see `Speed` skill use case)
peppy
committed
f66eb58
Cache `HitWindowGreat` to avoid constant fetches
peppy
committed
9755da9
Tidy up and reorder strain storage to avoid list copy overhead
peppy
committed
ec52f0d
More inlining and faster smoothstep with baked arguments
peppy
committed
4b44876
Remove impossible null check
peppy
committed
ba4a24e
Use quicker `Pow` in optimised `Norm` implementation
peppy
committed
8de316e
Remove LINQ overhead from `RhythmEvaluator`
peppy
committed
3441681

Commits on Jun 29, 2026

`pp-dev` cleanup pass (#38179)
stanriders
authored
4dfdf44
Fix outdated benchmark code
peppy
committed
081f497
Add Add documentation of `Pow` optimisations
peppy
committed
b7caf49

Commits on Jun 30, 2026

Merge branch 'master' into pp-dev
peppy
committed
00d08fe

Commits on Jul 25, 2026

Apply a few misc diff calc clean-ups (#38199)
tsunyoku
authored
6de031e

Commits on Jul 27, 2026