Angular-cli: Out of memory error when building with AOT

[pleerock]

When I run ng build --prod --aot

it goes fine until 40%, then it becomes slow, and once it gets to 64% it stucks. It stucks for ~10 minutes and throws exception:

 2649/2791 modules 142 active ...de_modules/socket.io-client/lib/on.js                                                                                                                           
<--- Last few GCs --->

  834523 ms: Mark-sweep 1346.7 (1433.1) -> 1346.6 (1435.1) MB, 913.7 / 0.0 ms [allocation failure] [GC in old space requested].
  835570 ms: Mark-sweep 1346.6 (1435.1) -> 1346.5 (1435.1) MB, 1047.1 / 0.0 ms [allocation failure] [GC in old space requested].
  836555 ms: Mark-sweep 1346.5 (1435.1) -> 1347.9 (1402.1) MB, 984.8 / 0.0 ms [last resort gc].
  837489 ms: Mark-sweep 1347.9 (1402.1) -> 1347.9 (1399.1) MB, 933.7 / 0.0 ms [last resort gc].


<--- JS stacktrace --->

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

Security context: 0x3a414ebcfb51 <JS Object>
    1: applyPluginsBailResult1 [/Users/pleerock/www/project/node_modules/tapable/lib/Tapable.js:~80] [pc=0x38e7e98874d4] (this=0x214e62096241 <a Parser with map 0x5828c3561c1>,name=0x3320359c0b99 <String[27]: evaluate FunctionExpression>,param=0x33c4cc2bf4c9 <a Node with map 0xf06457379f9>)
    2: evaluateExpression [/Users/pleerock/www/project/node_modules/webpack/lib/P...

FATAL ERROR: CALL_AND_RETRY_LAST Allocation failed - JavaScript heap out of memory
 1: node::Abort() [/usr/local/bin/node]
 2: node::FatalException(v8::Isolate*, v8::Local<v8::Value>, v8::Local<v8::Message>) [/usr/local/bin/node]
 3: v8::internal::V8::FatalProcessOutOfMemory(char const*, bool) [/usr/local/bin/node]
 4: v8::internal::Factory::NewFixedArray(int, v8::internal::PretenureFlag) [/usr/local/bin/node]
 5: v8::internal::HashTable<v8::internal::StringTable, v8::internal::StringTableShape, v8::internal::HashTableKey*>::EnsureCapacity(v8::internal::Handle<v8::internal::StringTable>, int, v8::internal::HashTableKey*, v8::internal::PretenureFlag) [/usr/local/bin/node]
 6: v8::internal::StringTable::LookupKey(v8::internal::Isolate*, v8::internal::HashTableKey*) [/usr/local/bin/node]
 7: v8::internal::StringTable::LookupString(v8::internal::Isolate*, v8::internal::Handle<v8::internal::String>) [/usr/local/bin/node]
 8: v8::internal::LookupIterator::LookupIterator(v8::internal::Handle<v8::internal::Object>, v8::internal::Handle<v8::internal::Name>, v8::internal::LookupIterator::Configuration) [/usr/local/bin/node]
 9: v8::internal::LookupIterator::PropertyOrElement(v8::internal::Isolate*, v8::internal::Handle<v8::internal::Object>, v8::internal::Handle<v8::internal::Object>, bool*, v8::internal::LookupIterator::Configuration) [/usr/local/bin/node]
10: v8::internal::Runtime::GetObjectProperty(v8::internal::Isolate*, v8::internal::Handle<v8::internal::Object>, v8::internal::Handle<v8::internal::Object>) [/usr/local/bin/node]
11: v8::internal::Runtime_KeyedGetProperty(int, v8::internal::Object**, v8::internal::Isolate*) [/usr/local/bin/node]
12: 0x38e7e52092a7
13: 0x38e7e98874d4
Abort trap: 6

mac OSX El Capitan
angular-cli: 1.0.0-beta.22-1
node: 6.6.0

Looks like there is memory leak somewhere. We have a big project. 1500 typescript files and almost 100k lines of code.

[gelliott181]

Probably not a leak, just a cap on your node heap. For others also seeking help with this, the issue is known to plague the CLI (#1652, #2974, #3099) when projects grow beyond what many of us consider small-medium sized codebases.

The fix it to set Node's heap size. This is done with node --max_old_space_size=[Space in MB] followed by whatever call you wanted to make, e.g. node --max_old_space_size=2048 ./node_modules/.bin/ng build --prod --aot (Credit to @hansl for that one line.)

[pleerock]

Don't really think that this process requires so much memory, either there is a memory leak, either there is a room for huge optimizations

[gelliott181]

I just built my project into a freshly generated dist. My process averaged 500-600MB and peaked at 883.7MB of memory space in use during the optimization and final emission of the bundle with ng build --prod --aot. I don't have a very large project, just three modules and 176KB of source, but the process keeps the entire build in memory.

[thinkingmedia]

I was able to build PHP projects, Grunt, Gulp, Phing and Bower projects with a machine that had only 1GB of Ram (Ubuntu 14). That machine compiled my Angular 1 projects for the last 2 years without any issues, and all my other projects.

My first Angular 2 with just a few components triggered this out of memory error. Had to upgrade my node to 2GB just to restore nightly builds.

I also ran out of memory doing npm install when it hit a build for a node dependency introduced by Angular 2.

[pleerock]

btw even with node --max_old_space_size=4048 ./node_modules/.bin/ng build --prod --aot it brings out of memory error on 92%

[filipesilva]

Dupe of https://github.com/angular/angular-cli/issues/1652 as @gelliott181 mentioned. It's better to keep issue discussion in a single thread.

[poddarkhushbu07]

Don't really think that this process requires so much memory, either there is a memory leak, either there is a room for huge optimizations

Any suggestion or trick to find the memory leak or where the optimisation is needed?

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