Compiler Explorer

JS + Duct tape + Compilers = profit?

gh:@mattgodbolt / tw:@mattgodbolt

What is it?

How it works

• JS editor widget
• node.js server API endpoint
• Display output

OSS

• golden-layout
• monaco
• CodeMirror
• node.js / express
• underscore
• jquery
• bootstrap
• lru-cache
• ...

• gcc
• clang
• go
• gdc
• ldc
• rustc
• objdump
• nginx
• ...

Duct tape

• Server: 2,300 LoC
• Client: 3,700 LoC

Deployment

EC2 on AWS

But

• 40GB of compiler binaries
• Hours to build and upload images

Solution

Solution

• Compiler binaries on NFS mount
• Scripts to update and deploy locally

I've run out of time

• Building compilers
• Security
• Handling load
• "Zero" downtime

Questions?

https://{d,gcc,go,rust}.godbolt.org
github.com/mattgodbolt/compiler-explorer
@mattgodbolt