Performance Improvements and New Features in Forked Version

[zao111222333]

Hey,

Thank you for creating this awesome work!

I’ve made some improvements while using this crate and wanted to share my fork. I would be delighted if some of my changes could be merged into this repo.

Some noticeable features include:

• WASM runtime support: Try it out in the demo.
• Static command registration using macros: I introduced gen_command! and gen_subcommand! macros to statically register commands during compilation, utilizing match blocks for command/subcommand token matching instead of indexing by HashMap. This optimization enhances performance since native and embedded commands should remain unchanged at runtime.
• Generic context support: Replaced ContextMap with a user-defined generic Ctx (the definition of Interpreter is now Interp<Ctx>), allowing direct access to the Interpreter’s context via interp.context.
• Multi-line command support in interactive terminal: Added support for incomplete mode when typing multi-line commands (e.g., if, for, …). You can try it in the demo.

Lastly, I evaluated the forked version against molt 0.3.2. Here are the results (note that performance is influenced by real-time CPU workload, and the values represent general cases):

• Command: cd molt-app && cargo run --release bench ../benchmarks/basic.tcl

• Platform: Intel Xeon 6348 CPU

molt-forked 0.4.0 (time unit in Nanos)	molt 0.3.2	Speedup (×)	Benchmark
89	208	2.34	ok-1.1 ok, no arguments
90	207	2.3	ok-1.2 ok, one argument
97	219	2.26	ok-1.3 ok, two arguments
119	209	1.76	ident-1.1 ident, simple argument
209	402	1.92	incr-1.1 incr a
158	311	1.97	set-1.1 set var value
201	348	1.73	list-1.1 list of six items

Thank you for considering these changes! If could, I will organize the changes and make PR.

[wduquette]

Thank you for your hard work! I am no longer working on Molt, and have not since, I think, 2020. The license is BSD; if you would like to continue development of your own fork, you have my blessing.

[zao111222333]

Thank you for your hard work! I am no longer working on Molt, and have not since, I think, 2020. The license is BSD; if you would like to continue development of your own fork, you have my blessing.

Thank you again for your support and creating such a solid foundation with Molt! If you ever decide to return or have any suggestions, I’d be delighted to hear from you.