umputun / revdiff / 30147304072

90%

Build Type

push

github

Committed by web-flow

Commit Message

perf(ui): index visual rows for page navigation (#287)

* perf(ui): index visual rows for page navigation

Page motions repeatedly recalculated the cursor's visual position from the start of the diff and rebuilt hunk and annotation metadata for every cursor step. This made PgUp, PgDown, Ctrl-U, and Ctrl-D increasingly expensive deeper into large files.

Build one visual-row index per page motion and reuse precomputed hunk and annotation state while preserving wrap, collapsed, and annotation semantics. A 10,000-line benchmark drops from roughly 233 ms to 48 ms per page motion.

* test(ui): lock indexed cursor rows to direct calculation

The indexed page-navigation path duplicates file-annotation and inline-annotation cursor adjustments from the direct calculation. Without an equivalence test, either path could drift while page-motion deltas continued to hide the regression.

Exercise every cursor index and annotation state with wrapping, file and inline annotations, and a collapsed hunk, and document the indexed lookup precondition.

Coverage Stats

33 of 35 new or added lines in 2 files covered. (94.29%)

24 existing lines in 2 files now uncovered.

11038 of 12276 relevant lines covered (89.92%)

2805.17 hits per line