Li Benchmarks

euler_fluid_2d 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: 0.868 (86.8% of rust speed) (table SOTA: rust — best competitor; charts use rust = 1.0)
Best competitor value: 0.0033 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 euler_fluid_2d)
Category: physics
Pillar: physics
Package: lic
Li / catalog oracle (mean ± σ): 0.0038 ± 0.000337 s (n=200) / 0.0035 ± 0.000313 s (n=200) (cpp)
Ratio vs catalog oracle: 1.0857×
Best competitor: rust (0.0033 s)
Li relative speed vs SOTA: 0.868 (1.0 = rust speed)
Validity: validity pass
Threshold: 1.2×
Source: lic/benchmarks/workloads/tier2_physics/euler_fluid_2d

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	0.0038 ± 0.000337	200	s	release	linux
cpp	0.0035 ± 0.000313	200	s	release	linux
rust	0.0033 ± 0.000183	200	s	release	linux
julia	0.0034 ± 0.000225	200	s	release	linux
Metric: wall_time (value = mean of timed runs)