Module fast_path 

Minimal Inline Deployment (Fast-Path Proxy)

This module implements a reduced per-pixel proxy derived from residual evolution. It is NOT the full DSFB supervisory system. It is a constrained proxy intended to assess deployment feasibility under strict real-time budgets.

The proxy computes per pixel: r_t = L1(C_t - H_t) / 3 residual magnitude d_t = r_t - r_{t-1} drift s_t = d_t - d_{t-1} slew u_t = |d_t| + lambda * |s_t| scalar proxy T_t = saturate(1 - k * u_t) trust

Optionally, u_t is averaged over a 3×3 neighborhood before trust computation.

State: two scalar per-pixel history buffers (residual, drift). Output: one scalar per-pixel trust buffer.

No heap allocation occurs in the inner loop of the CPU reference path.

Structs

FastPathCpuOutput

Output from one frame of the CPU reference fast-path computation.

FastPathGpuOutput

Result from a single-frame GPU fast-path kernel execution.

FastPathTimingEntry

One row in the fast-path timing study output.

FastPathTimingStudy

Full result from run_fast_path_timing_study.

Constants

FAST_PATH_K

Default trust slope k. Scales the proxy before saturation.

FAST_PATH_LAMBDA

Default slew weight λ. Applied to |s_t| in the proxy formula.

Functions

render_trust_strip_svg

Render a trust field as a simple SVG heat-map strip (one rect per pixel column).

run_fast_path_cpu

CPU reference implementation of the minimal inline fast-path proxy.

run_fast_path_timing_study

Run the GPU timing study for the fast-path proxy at 1080p and 4K.

try_run_fast_path_gpu

Execute one frame of the GPU fast-path proxy.