template_add/nested/triple are slow to compile

[certik]

In this example, when you modify the print statement, it takes a noticeable lag after clicking Run to see the results. It's still a fraction of a second, but it's noticeable. While most other examples run immediately. Why would that be? This example is very simple, so I would expect things to run immediately.

[Shaikh-Ubaid]

Could you share the updated/modified example, please?

PS: There seems some minor delay. We should benchmark and/or debug.

[certik]

Could you share the updated/modified example, please?

This one:

lcompilers_frontend/utils/preinstalled_programs.js

Line 66 in 0ebe739

template_add: `module template_add_m

[certik]

Most examples compile quickly. The goal is to always compile under 30ms, which most people perceive as "immediate".

I noticed the following examples compile slowly:

• template_add: 130ms
• template_nested: 126ms
• template_triple: 113ms

All other template examples compile under 30ms.

We should be running LFortran in Release mode (#80), which might completely fix this. If it does not, then we need to investigate.

We also need to test locally how LFortran performs from the command line.

[Shaikh-Ubaid]

In release mode, the compilation time seems to be less than 30ms for template_add and template_nested. For template_triple, it is around ~60ms. I think we need to optimize the flow.

[certik]

Perfect, so just template_triple needs to be optimized. Not the highest priority right now, but we should investigate what is slowing it down, in case there is something in our design that we need to fix. CC @ansharlubis as well, if you know what could be causing it, let us know.

[ansharlubis]

A possible reason is that we track requirements and templates with maps inside the compiler instead of defining them in the ASR, I figure this adds some unnecessary memory access during compilation.