[Caml-list] from oasis to obuild (original subject was Re: Accelerating compilation)

[Francois Berenger <berenger@riken.jp>]

On 09/07/2013 05:51 AM, Fabrice Le Fessant wrote:
 > [...]
> FWIW, I recently compiled Merlin with both ocamlbuild and ocp-build,
> on a quad-core with "-j 10" for both (the link to the ocp-build
> description file is in the latest OCamlPro's report), ocamlbuild needs
> 13s where ocp-build only needs 4s to compile everything.

I recently switched from oasis to obuild.

The main reason I adopted oasis in the past is because the project
description file (_oasis) is very short.

With ocp-build, (as far as I know) I would have to list all the files
my program/libraries need to be built, and I am too lazy for that.

But now, I have a project.obuild file instead, which
is as terse as an _oasis file.

Here is my project.obuild file:
---
Name:         something
Version:      0.1
Authors:      me
License:      GPL
Synopsis:     some_more_things
obuild-ver:   1

Executable ac
   Path:           .
   BuildDepends:   batteries, dolog, parmap, vector3, biniou, atd, atdgen
   MainIs:         ac.ml

[...] some other executables follow
---

Compile time before, with oasis:

# cat build.sh
#!/bin/bash

#set -x

oasis setup
ocaml setup.ml -configure
ocaml setup.ml -build

# time ./build.sh
real    0m9.397s

Compile time after, with obuild:
# obuild clean && time (obuild configure && obuild build -j 1)
real    0m3.624s

-- 
Best regards,
Francois Berenger.