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Thomas Leitner

@gettalong.bsky.social

(Open source) Software developer, creator of kramdown and HexaPDF, Sci-Fi fan.

31 Posts31 Follower56 Folgt
Vienna.rb@ruby.wien · 6mo ago

Time for another Vienna Ruby Meetup! 🎉 It's been three months since the last meetup. To make up for it, we got three wonderful talks covering a wide range of topics this time. Thank you to Meister for hosting us!

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Thomas Leitner@gettalong.bsky.social · last yr.

So, I now have implemented a basic template system for VersaDok. However, using ERB as preprocessor instead of the built-in template system is faster in most cases (even though the larger source doc needs to be parsed every time) because AST nodes need to be rendered many times more.

Thomas Leitner@gettalong.bsky.social · last yr.

So I have been working on something lately, lightweight markup related. Turns out it's at least 4 times faster than kramdown when parsing the same document (n.b. a bit of an apple to banana comparison as kramdown can do much more at the moment but still 🤯)

Without YJIT on Ruby 3.4.1 Warming up -------------------------------------- kramdown 259.422 i/s - 270.000 times in 1.040775s (3.85ms/i) versadok 1.158k i/s - 1.265k times in 1.091970s (863.22μs/i) Calculating ------------------------------------- kramdown 276.681 i/s - 778.000 times in 2.811901s (3.61ms/i) versadok 1.138k i/s - 3.475k times in 3.052762s (878.49μs/i) Comparison: versadok: 1138.3 i/s kramdown: 276.7 i/s - 4.11x slower With YJIT on Ruby 3.4.1 Warming up -------------------------------------- kramdown 334.871 i/s - 336.000 times in 1.003372s (2.99ms/i) versadok 1.853k i/s - 1.969k times in 1.062396s (539.56μs/i) Calculating ------------------------------------- kramdown 315.374 i/s - 1.004k times in 3.183520s (3.17ms/i) versadok 1.822k i/s - 5.560k times in 3.052272s (548.97μs/i) Comparison: versadok: 1821.6 i/s kramdown: 315.4 i/s - 5.78x slower
Thomas Leitner@gettalong.bsky.social · last yr.

So, Ruby friends, how do I remove count number of trailing elements from an array *without* creating a new result array? There is Array#pop(count) but that creates an array I don't need or want ;-)