A simple, high performance text editor.
Greg Pomerantz
3c8017f871
The chunked buffer was the right structure for this workload, but the implementation let the edited chunk grow without bound (the type comment even admitted 'not rebalanced'): sustained typing at one spot made that chunk grow monotonically, so each subsequent insert copied the whole grown chunk -- quadratic total copy work for sustained typing. Insert now splits any chunk that grows past 2x the target size in half, and the empty-buffer path chunks a large first paste directly instead of creating one oversized chunk. The per-edit copy cost is now bounded by O(chunkSize) by construction. The split cut is an arbitrary byte offset (like SetContent boundaries): chunk edges may fall inside multi-byte sequences, which is fine because readers reassemble whole line-aligned windows from chunk bytes. Shrunken/empty chunks from deletes are left in place: chunk count never grows with deletes, all readers walk actual lengths, and removal would be pure churn with no reader-side benefit. No behavior change visible to readers (Content/FullContent/LineIndex all walk actual chunk lengths); covered by three new tests: sustained-typing chunk-size invariant + content, large paste into empty buffer, and content integrity across newly created split boundaries. Full suite green under -race. |
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| .qwen | ||
| cmd/pad | ||
| doc | ||
| internal | ||
| scripts | ||
| .DS_Store | ||
| .gitignore | ||
| go.mod | ||
| go.sum | ||