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by lightblade 2768 days ago
When you write JavaScript, you can only optimize it..as JavaScript. It still needs to be parsed, compiled, and optimized as JavaScript.

When you write templates, you get more room for optimization. Glimmer engine compiles templates to binary bytecodes to bypass JavaScript parsing. Vue3 inlines component fragments as part of the compilation step.
1 comments
jaredklewis 2768 days ago
Not sure I follow.

Glimmer compiles to bytecode, but I am not sure how that “bypass[es] JavaScript parsing” as the bytecode is evaluated by a runtime written in JS (which is obviously parsed) and that translates the bytecode into JS calls. Basically one type of parsing has been replaced with another, which is fine though not obviously faster.

Likewise, I don’t see the point with Vue since again vue templates are translated into JS calls.

Or you could just make JS calls, like React does, no runtime translation required.

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lightblade 2768 days ago
Yes, the runtime needs to be JavaScript.

It’s not obviously faster, but it’s been benchmarked to be faster. https://youtu.be/nXCSloXZ-wc

You can skip to 29:34 for the performance demo.

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