Problem: YAML syntax highlighting is slow; the yamlInteger and yamlFloat
rules alone account for over half of the parsing time.
Solution: The number, null and timestamp scalar patterns begin with a
lookbehind, which stops the regexp engine from using a
first-character search, so the automatic engine selects the
much slower NFA engine. Force the backtracking engine with
\%#=1 on these patterns for a large speedup with identical
matches (Jordan).
On a 40000-line YAML file the total :syntime drops by about 30%: the
yamlFloat rule goes from 0.61s to 0.17s and yamlInteger from 0.42s to 0.31s.
The engine override is applied only to the lookbehind-anchored number rules;
forcing it on the structural plain-scalar and mapping-key patterns regresses
them badly, so those are left on the automatic engine.
closes: vim/vim#21182560dfadac8
Co-authored-by: Julien Voisin <julien.voisin@dustri.org>
runtime(yaml): improve syntax highlighting for YAML
- Recognize block scalar style to avoid unexpected highlighting by `yamlFlowString` (fixvim/vim#11517)
- Improve performance of `yamlFlowMappingKey` by allowing execution by the NFA engine (fixvim/vim#10730)
- It was intentionally disabled before patterns were optimized by `s:SimplifyToAssumeAllPrintable`.
- Fix detection of flow style mapping indicators (fixvim/vim#8234).
- Enable highlighting of explicit mapping value indicators and node properties in flow style.
- Add syntax highlighting tests
closes: vim/vim#14354cc7597c1ed
Co-authored-by: itchyny <itchyny@cybozu.co.jp>
Vim runtime files based on 7.4.384 / hg changeset 7090d7f160f7
Excluding:
Amiga icons (*.info, icons/)
doc/hangulin.txt
tutor/
spell/
lang/ (only used for menu translations)
macros/maze/, macros/hanoi/, macros/life/, macros/urm/
These were used to test vi compatibility.
termcap
"Demonstration of a termcap file (for the Amiga and Archimedes)"
Helped-by: Rich Wareham <rjw57@cam.ac.uk>
Helped-by: John <john.schmidt.h@gmail.com>
Helped-by: Yann <yann@yann-salaun.com>
Helped-by: Christophe Badoit <c.badoit@lesiteimmo.com>
Helped-by: drasill <github@tof2k.com>
Helped-by: Tae Sandoval Murgan <taecilla@gmail.com>
Helped-by: Lowe Thiderman <lowe.thiderman@gmail.com>
