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https://github.com/luafun/luafun
Lua Fun is a high-performance functional programming library for Lua designed with LuaJIT's trace compiler in mind.
https://github.com/luafun/luafun
functional-programming lua luajit luarocks
Last synced: about 16 hours ago
JSON representation
Lua Fun is a high-performance functional programming library for Lua designed with LuaJIT's trace compiler in mind.
- Host: GitHub
- URL: https://github.com/luafun/luafun
- Owner: luafun
- License: other
- Created: 2013-11-19T19:02:26.000Z (about 11 years ago)
- Default Branch: master
- Last Pushed: 2024-10-09T16:15:46.000Z (2 months ago)
- Last Synced: 2024-12-05T20:02:21.286Z (7 days ago)
- Topics: functional-programming, lua, luajit, luarocks
- Language: Lua
- Homepage: https://luafun.github.io/
- Size: 520 KB
- Stars: 2,123
- Watchers: 69
- Forks: 107
- Open Issues: 38
-
Metadata Files:
- Readme: README.md
- Contributing: CONTRIBUTING.md
- License: COPYING.md
Awesome Lists containing this project
- awesome-defold - LuaFun - performance functional programming library. (Libraries / Programming Language)
README
Lua Functional
==============
**Lua Fun** is a high-performance functional programming library for [Lua]
designed with [LuaJIT's trace compiler][LuaJIT] in mind.
Lua Fun provides a set of more than 50 programming primitives typically
found in languages like Standard ML, Haskell, Erlang, JavaScript, Python and
even Lisp. High-order functions such as ``map``, ``filter``, ``reduce``,
``zip``, etc., make it easy to **write simple and efficient functional code**.
Let's see an example:
```lua
> -- Functional style
> require "fun" ()
> -- calculate sum(x for x^2 in 1..n)
> n = 100
> print(reduce(operator.add, 0, map(function(x) return x^2 end, range(n))))
328350
> -- Object-oriented style
> local fun = require "fun"
> -- calculate sum(x for x^2 in 1..n)
> print(fun.range(n):map(function(x) return x^2 end):reduce(operator.add, 0))
328350
```
**Lua Fun** takes full advantage of the innovative **tracing JIT compiler**
to achieve transcendental performance on nested functional expressions.
Functional compositions and high-order functions can be translated into
**efficient machine code**. Can you believe it? Just try to run the example
above with ``luajit -jdump`` and see what happens:
```asm
-- skip some initialization code --
->LOOP:
0bcaffd0 movaps xmm5, xmm7
0bcaffd3 movaps xmm7, xmm1
0bcaffd6 addsd xmm7, xmm5
0bcaffda ucomisd xmm7, xmm0
0bcaffde jnb 0x0bca0024 ->5
0bcaffe4 movaps xmm5, xmm7
0bcaffe7 mulsd xmm5, xmm5
0bcaffeb addsd xmm6, xmm5
0bcaffef jmp 0x0bcaffd0 ->LOOP
---- TRACE 1 stop -> loop
```
The functional chain above was translated by LuaJIT to (!) **one machine loop**
containing just 10 CPU assembly instructions without CALL. Unbelievable!
Readable? Efficient? Can your Python/Ruby/V8 do better?
Status
------
**Lua Fun** is in an early alpha stage. The library fully
[documented][Documentation] and covered with unit tests.
[][Travis]
LuaJIT 2.1 alpha is recommended. The library designed in mind of fact that
[LuaJIT traces tail-, up- and down-recursion][LuaJIT-Recursion] and has a lot of
[byte code optimizations][LuaJIT-Optimizations]. Lua 5.1-5.3 are also
supported.
This is **master** (development) branch. API may be changed without any special
notice. Please use **stable** branch for your production deployments.
If you still want to use **master**, please don't forget to grep `git log`
for *Incompatible API changes* message. Thanks!
Please check out [documentation][Documentation] for more information.
Misc
----
**Lua Fun** is distributed under the [MIT/X11 License] -
(same as Lua and LuaJIT).
The library was written to use with [Tarantool] - an efficient in-memory
store and an asynchronous Lua application server.
See Also
--------
* [Documentation]
* [RockSpec]
* [RPM/DEB packages](https://packagecloud.io/rtsisyk/master)
* [Hacking]
* [email protected]
* [email protected]
* [email protected]
[Lua]: https://www.lua.org/
[LuaJIT]: https://luajit.org/luajit.html
[LuaJIT-Recursion]: http://lambda-the-ultimate.org/node/3851#comment-57679
[LuaJIT-Optimizations]: http://wiki.luajit.org/Optimizations
[MIT/X11 License]: https://opensource.org/licenses/MIT
[Tarantool]: https://github.com/tarantool/tarantool
[Getting Started]: https://luafun.github.io/getting_started.html
[Documentation]: https://luafun.github.io/
[Travis]: https://travis-ci.org/luafun/luafun
[RockSpec]: https://raw.github.com/luafun/luafun/master/fun-scm-1.rockspec
[Hacking]: HACKING.md
Please **"Star"** the project on GitHub to help it to survive! Thanks!
*****
**Lua Fun**. Simple, Efficient and Functional. In Lua. With JIT.