1.3 KiB
epic, story, title, status
| epic | story | title | status |
|---|---|---|---|
| 13 | 13.1 | Real-Time Evaluation (< 16 ms per Line) | draft |
Epic 13 — Performance & Reliability
Goal: Instant evaluation, never lose work.
Story 13.1: Real-Time Evaluation (< 16 ms per Line)
As a CalcPad user, I want every line to evaluate in under 16 ms so that a 500-line sheet completes in under 100 ms, So that calculations feel instantaneous and I never experience lag while typing.
Acceptance Criteria:
Given a sheet containing 500 lines of mixed arithmetic, unit conversions, and variable references When the engine evaluates the entire sheet Then total evaluation time is under 100 ms on an Apple M1 or equivalent modern x86 processor And no individual line takes longer than 16 ms to evaluate
Given a user is typing on a line that triggers re-evaluation When a keystroke modifies an expression Then the result column updates within one animation frame (< 16 ms) for that line And the UI thread is never blocked long enough to drop a frame
Given a sheet with 1 000 lines of complex expressions including nested unit conversions and currency lookups When the engine evaluates the full sheet Then total evaluation completes in under 250 ms And a performance warning is logged if any single line exceeds 16 ms