JavaScript heap out of memory

I’m getting a JavaScript heap out of memory error when trying to run tsc --noEmit. Node version: v10.16.0 TypeScript: 3.4.3 ts-loader: 5.4.5 ts-node: 8.1.0

I guess the problem can be fixed by upgrading the dependencies to the latest versions and increasing max-old-space-size, but that’s unfortunately not possible yet in my current project 😦

---

<--- Last few GCs --->

[23026:0x4400980]    40880 ms: Scavenge 1384.8 (1423.9) -> 1384.4 (1424.4) MB, 12.3 / 0.0 ms  (average mu = 0.165, current mu = 0.085) allocation failure
[23026:0x4400980]    40893 ms: Scavenge 1385.1 (1424.4) -> 1384.7 (1424.9) MB, 7.9 / 0.0 ms  (average mu = 0.165, current mu = 0.085) allocation failure
[23026:0x4400980]    41493 ms: Mark-sweep 1385.4 (1424.9) -> 1384.9 (1424.9) MB, 595.0 / 0.0 ms  (average mu = 0.113, current mu = 0.056) allocation failure scavenge might not succeed


<--- JS stacktrace --->

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

    0: ExitFrame [pc: 0xb91310dbe1d]
Security context: 0x1e0c9099e6e9 <JSObject>
    1: addPropertyToElementList(aka addPropertyToElementList) [0x21d642b90aa9] [/mnt/c/dev/node_modules/typescript/lib/tsc.js:~28448] [pc=0xb9131ad340a](this=0x0c2a182026f1 <undefined>,propertySymbol=0x16d1c4d04069 <Symbol map = 0x6cba608dd59>,context=0x262e61498bc1 <Object map = 0x15291fe33dc9>,typeElements=0x332e3ae4a389 <JSArray[0]>)
    2: createTy...

FATAL ERROR: Ineffective mark-compacts near heap limit Allocation failed - JavaScript heap out of memory
 1: 0x8f9d10 node::Abort() [node]
 2: 0x8f9d5c  [node]
 3: 0xaffd0e v8::Utils::ReportOOMFailure(v8::internal::Isolate*, char const*, bool) [node]
 4: 0xafff44 v8::internal::V8::FatalProcessOutOfMemory(v8::internal::Isolate*, char const*, bool) [node]
 5: 0xef4152  [node]
 6: 0xef4258 v8::internal::Heap::CheckIneffectiveMarkCompact(unsigned long, double) [node]
 7: 0xf00332 v8::internal::Heap::PerformGarbageCollection(v8::internal::GarbageCollector, v8::GCCallbackFlags) [node]
 8: 0xf00c64 v8::internal::Heap::CollectGarbage(v8::internal::AllocationSpace, v8::internal::GarbageCollectionReason, v8::GCCallbackFlags) [node]
 9: 0xf038d1 v8::internal::Heap::AllocateRawWithRetryOrFail(int, v8::internal::AllocationSpace, v8::internal::AllocationAlignment) [node]
10: 0xeccd54 v8::internal::Factory::NewFillerObject(int, bool, v8::internal::AllocationSpace) [node]
11: 0x116cede v8::internal::Runtime_AllocateInNewSpace(int, v8::internal::Object**, v8::internal::Isolate*) [node]
12: 0xb91310dbe1d
[1]    23026 abort (core dumped)  npx tsc --noEmit

[zernie]

@Eyas btw, the resulting typings file for schema-dts is huge - ~10k LOC. I wonder if breaking it into a smaller not interconnected pieces can help.

[Eyas]

Hi all – I managed to reproduce a related issue more reliably, and changes in 0.8.1 should address it. I’m not sure if it’s enough per se, but I’m noticing notable improvements on my end.