issue454bench

Overview ¶

Command issue454bench reproduces the downstream editor measurements from issue #454 on synthetic single-language fixtures.

It generates a repetitive source of the requested size, then either times a fresh full parse or applies one single-byte edit (replace, insert, or delete) at the first near-top identifier and reports the incremental parse profile against a fresh parse of the edited bytes.

Usage:

go run ./cmd/issue454bench <lang> <sizeKB> <mode> [reps]

The Make report fixture also accepts broken, broken-mid, broken-last, and half-typed modes. sizeKB accepts decimals such as 3.5.

Set ISSUE454_CPUPROFILE=<path> to write a CPU profile of the measured parses.