Project

mirahd

0.0
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mirahd is a Mirah Daemon listening for your requests to compile something. When it receives one it does the job quickly. Really quickly.
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 Popularity
Downloads
9,888
Stars
3
Forks
0
Watchers
3
 Releases
Current version
0.0.2
Total releases
3
First release
2012-06-10
Latest release
2013-02-27
 Development
Primary Language
Ruby
Licenses
MIT
Average date of last 50 commits
2012-08-05
Reverse Dependencies
0

 Dependencies

Runtime

mirah
>= 0
 Project Readme

mirahd

mirahd is a Mirah Daemon listening for your requests to compile something. When it receives one it does the job quickly. Really quickly.

Build Status Code Climate

Usage

We'll need:

  • Bundler,
  • Mirah 0.1, and as a result
  • JRuby 1.7.

For your own comfort and sanity it is also advisable to install a Ruby implementation with a reasonably short start up time. MRI or Rubinius are good candidates.

jruby -S bundle install
jruby -S rspec -I. test
jruby -rubygems -I lib -S bin/mirahd --daemon
ruby -I lib bin/mirahd test/hello.mirah

Rationale

Mirah is a lovely language but its low compilation speed might be discouraging. Using it in development based on a lot of small code, test, refactor cycles might be problematic. JVM's start up time and a lag introduced by compilation of Mirah's sources by JRuby add up to the sum we see below¹.

$ time mirahc test/hello.mirah > /dev/null # with disk's cache warmed up
18.60user 0.45system 0:11.85elapsed

After the initial warm up JVM and JRuby are pretty fast. The goal of this project is to make the JVM start once only and then reuse the existing process for all subsequent compilation tasks.

Run the daemon.

$ jruby -rubygems -I lib -S bin/mirahd --daemon

The first compilation is already quite quick.

$ time ruby -I lib -S bin/mirahd test/hello.mirah
0.05user 0.00system 0:00.89elapsed

Then JVM's JIT comes into play. Here's the tenth compilation.

$ time ruby -I lib -S bin/mirahd test/hello.mirah
0.04user 0.00system 0:00.30elapsed

Todo

  • Security. By being able to access the port DRb is listening on you can eval whatever you want to. $SAFE won't work as it's unsupported by JRuby.
  • Enable users to specify the port number.
  • Write tests covering a server running in a different directory then the client. It won't be possible without spawning 2 separate processes.
  • Support --help et al. command line arguments.
  • Concurrency. Two compilation requests might interfere with each other, especially due to changing the current working directory.

Copyrights

Copyright (c) 2012–2013 Jan Stępień

Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:

The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.

¹ That's a 64-bit OpenJDK 6 on Intel Core 2 Duo with GNU/Linux 3.2.8.