prod build runs out of memory

[livtanong]

Stack Trace

<--- Last few GCs --->

  107608 ms: Mark-sweep 1360.1 (1435.2) -> 1360.1 (1435.2) MB, 2453.1 / 0.0 ms [allocation failure] [GC in old space requested].
  110077 ms: Mark-sweep 1360.1 (1435.2) -> 1360.1 (1435.2) MB, 2469.4 / 0.0 ms [allocation failure] [GC in old space requested].
  112562 ms: Mark-sweep 1360.1 (1435.2) -> 1363.6 (1419.2) MB, 2484.6 / 0.0 ms [last resort gc].
  115055 ms: Mark-sweep 1363.6 (1419.2) -> 1367.1 (1419.2) MB, 2492.4 / 0.0 ms [last resort gc].


<--- JS stacktrace --->

==== JS stack trace =========================================

Security context: 0x76241dcfb51 <JS Object>
    1: visitQueue [/Users/levi/repos/load-app/node_modules/babel-traverse/lib/context.js:~114] [pc=0x1ff0c180cb82] (this=0x380393cc8451 <a TraversalContext with map 0x35352b580b11>,queue=0xda0eadf7869 <JS Array[1]>)
    2: node [/Users/levi/repos/load-app/node_modules/babel-traverse/lib/index.js:~94] [pc=0x1ff0c1837a82] (this=0x2532e6106309 <JS Function traverse (SharedFunctionInfo 0x3f68fc267ad…

Reproduction

With a medium-complexity project...

1. lein prod-build
2. npm start
3. react-native run-ios

Context

The problem occurred despite the following:

• --max_old_space_size=8192 already set in project.pbxproj
• In project.clj, :optimizations set to :simple

[seantempesta]

Okay, this is a dirty dirty hack, but it's the only way I could get my complex app to build.

facebook/react-native#5196 (comment)

[drapanjanas]

Hi, personally havent hit on this one yet (probably because never finished any real RN app so far) so cannot help. But it's interesting when you guys start to hit it? Is it starting after your index.ios.js reaches a certain size?

[seantempesta]

Well, I'm not exactly sure, but I'm guessing that's the case. react native walks the generated file for all dependencies and at some point it runs out of memory.