Why not just use antlr to impl the interpretor? about jinjava

[jasmith-hs]

One reason would be because it's likely much slower, see:

Antlr is now down to being only ~4 times slower than the handwritten parser.

antlr/antlr4#1540

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if you want the absolute best performance you may want to opt for a custom parser

https://tomassetti.me/improving-the-performance-of-an-antlr-parser/

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They helped me realize that parsing is not magic, and if you have performance issues with ANTLR, you can actually write a decent parser for any sensible language by hand.

https://groups.google.com/g/antlr-discussion/c/74aPR8wjXe4

We care a lot about performance as we use Jinjava to server-side render pages for HubSpot's CMS.

[YuyuZha0]

Make sense, thanks!