Li Benchmarks

rigid_body_stack greenvalidity pass

Tier 2 · wall_time · tier2 default grid · variant shared_c_kernel · OS linux

passpass — perf claims allowed when ratio is green

Source: latest.csv:perf_present

Wall-clock row exists only — no explicit correctness signal yet.

Ratio vs best competitor: 0.853 (85.3% of rust speed) (table SOTA: rust — best competitor; charts use rust = 1.0)
Best competitor value: 0.0029 s

No analytical verify rows in ingest yet. Run tier-1 with --verify so latest.csv exports verify_ulps / verify_within_1ulp.

Problem size: tier2 default grid (family rigid_body_stack)
Category: physics
Pillar: physics
Package: lic
Li / catalog oracle (mean ± σ): 0.0034 ± 0.00025 s (n=200) / 0.003 ± 0.000243 s (n=200) (cpp)
Ratio vs catalog oracle: 1.1333×
Best competitor: rust (0.0029 s)
Li relative speed vs SOTA: 0.853 (1.0 = rust speed)
Validity: validity pass
Threshold: 1.2×
Source: lic/benchmarks/workloads/tier2_physics/rigid_body_stack

PH ids: PH-5b

Compare oracle: cpp

Relative speed vs best competitor (rust) — SOTA = 1.0, higher is better. Absolute s values are in the table below.

Language comparison
Lang	Mean ± σ	Runs	Unit	Variant	OS
li	0.0034 ± 0.00025	200	s	release	linux
cpp	0.003 ± 0.000243	200	s	release	linux
rust	0.0029 ± 0.000259	200	s	release	linux
julia	0.0032 ± 0.000301	200	s	release	linux
Metric: wall_time (value = mean of timed runs)