LuaJIT vs Terra : Terra outperforming LuaJit for a long running program

rohit.c.joshi · 2014-10-20T09:18:18+00:00

Hello agentzh,Thanks for the info. After posting my question I have been analyzing your lua-resty-upstream-healthcheck module and all answers are really...

LuaJIT vs Terra : Terra outperforming LuaJit for a long running program

rohit.c.joshi

Recently I came across a terra programming language which can compile lua code without modification. I did some performance test for Fibonacci series in which LuaJIT is ~45% slower than terra when ran for fibonacci number 50.

Fibonacci numbers: LuaJIT vs Terra

agentzh

Hello!

On Sun, Oct 19, 2014 at 6:18 PM, RJoshi wrote:
> Recently I came across a terra programming language which can compile lua
> code without modification.    I did some performance test for Fibonacci
> series  in which LuaJIT is ~45% slower than terra when ran for fibonacci
> number 50.
>
> Fibonacci numbers: LuaJIT vs Terra
>

Terra looks useful for CPU-intensive work where we don't want to write
external C/C++ code (or cannot due to requirements from dynamic code
generation).

But I'd like to see more complicated real-world test cases :)

Regards,
-agentzh

anorov.vorona

I imagine LuaJIT, with calls to C/C++ via FFI, is sufficient for the vast majority of workloads you'd use with Openresty.

However, on the bright side, to my understanding it should be pretty easy to make use of Terra with Openresty (with no modifications to nginx/Openresty) if you want to. You should be able to compile a Terra file and load it from Lua with ffi.load(), with practically no overhead. Not exactly as simple as passing the Terra file to a hypothetical "content_by_terra_file" directly, but it's quite close. Just keep all your Terra functions to their own separate files.

On Sunday, October 19, 2014 9:18:17 PM UTC-4, RJoshi wrote:

Recently I came across a terra programming language which can compile lua code without modification. I did some performance test for Fibonacci series in which LuaJIT is ~45% slower than terra when ran for fibonacci number 50.

Fibonacci numbers: LuaJIT vs Terra