执行happy命令的时候报内存益处

[tuzisang]

apple@appledeMacBook-Pro ~ % happy

<--- Last few GCs --->

[89345:0x140008000] 1323897 ms: Mark-Compact 3556.9 (4131.3) -> 3540.5 (4131.6) MB, 749.17 / 0.88 ms (average mu = 0.309, current mu = 0.280) allocation failure; scavenge might not succeed
[89345:0x140008000] 1324941 ms: Mark-Compact 3557.6 (4131.6) -> 3541.2 (4132.1) MB, 758.17 / 0.96 ms (average mu = 0.292, current mu = 0.274) allocation failure; scavenge might not succeed

<--- JS stacktrace --->

FATAL ERROR: Ineffective mark-compacts near heap limit Allocation failed - JavaScript heap out of memory
----- Native stack trace -----

1: 0x1029cc0e8 node::OOMErrorHandler(char const*, v8::OOMDetails const&) [/Users/apple/.nvm/versions/node/v20.20.0/bin/node]
2: 0x102b7b048 v8::internal::V8::FatalProcessOutOfMemory(v8::internal::Isolate*, char const*, v8::OOMDetails const&) [/Users/apple/.nvm/versions/node/v20.20.0/bin/node]
3: 0x102d88f14 v8::internal::Heap::GarbageCollectionReasonToString(v8::internal::GarbageCollectionReason) [/Users/apple/.nvm/versions/node/v20.20.0/bin/node]
4: 0x102d8ca10 v8::internal::Heap::CollectGarbageShared(v8::internal::LocalHeap*, v8::internal::GarbageCollectionReason) [/Users/apple/.nvm/versions/node/v20.20.0/bin/node]
5: 0x102d8988c v8::internal::Heap::PerformGarbageCollection(v8::internal::GarbageCollector, v8::internal::GarbageCollectionReason, char const*) [/Users/apple/.nvm/versions/node/v20.20.0/bin/node]
6: 0x102d87408 v8::internal::Heap::CollectGarbage(v8::internal::AllocationSpace, v8::internal::GarbageCollectionReason, v8::GCCallbackFlags) [/Users/apple/.nvm/versions/node/v20.20.0/bin/node]
7: 0x102d7d718 v8::internal::HeapAllocator::AllocateRawWithLightRetrySlowPath(int, v8::internal::AllocationType, v8::internal::AllocationOrigin, v8::internal::AllocationAlignment) [/Users/apple/.nvm/versions/node/v20.20.0/bin/node]
8: 0x102d7df70 v8::internal::HeapAllocator::AllocateRawWithRetryOrFailSlowPath(int, v8::internal::AllocationType, v8::internal::AllocationOrigin, v8::internal::AllocationAlignment) [/Users/apple/.nvm/versions/node/v20.20.0/bin/node]
9: 0x102d62450 v8::internal::Factory::NewFillerObject(int, v8::internal::AllocationAlignment, v8::internal::AllocationType, v8::internal::AllocationOrigin) [/Users/apple/.nvm/versions/node/v20.20.0/bin/node]
10: 0x10316f588 v8::internal::Runtime_AllocateInYoungGeneration(int, unsigned long*, v8::internal::Isolate*) [/Users/apple/.nvm/versions/node/v20.20.0/bin/node]
11: 0x103500c44 Builtins_CEntry_Return1_ArgvOnStack_NoBuiltinExit [/Users/apple/.nvm/versions/node/v20.20.0/bin/node]
12: 0x1035836d4 Builtins_CreateTypedArray [/Users/apple/.nvm/versions/node/v20.20.0/bin/node]
13: 0x107f4cff8
14: 0x10808e550
15: 0x1034af130 Builtins_AsyncFunctionAwaitRejectClosure [/Users/apple/.nvm/versions/node/v20.20.0/bin/node]
16: 0x10355d118 Builtins_PromiseRejectReactionJob [/Users/apple/.nvm/versions/node/v20.20.0/bin/node]
17: 0x10349ecac Builtins_RunMicrotasks [/Users/apple/.nvm/versions/node/v20.20.0/bin/node]
18: 0x1034763f4 Builtins_JSRunMicrotasksEntry [/Users/apple/.nvm/versions/node/v20.20.0/bin/node]
19: 0x102cf3984 v8::internal::(anonymous namespace)::Invoke(v8::internal::Isolate*, v8::internal::(anonymous namespace)::InvokeParams const&) [/Users/apple/.nvm/versions/node/v20.20.0/bin/node]
20: 0x102cf42b0 v8::internal::(anonymous namespace)::InvokeWithTryCatch(v8::internal::Isolate*, v8::internal::(anonymous namespace)::InvokeParams const&) [/Users/apple/.nvm/versions/node/v20.20.0/bin/node]
21: 0x102cf449c v8::internal::Execution::TryRunMicrotasks(v8::internal::Isolate*, v8::internal::MicrotaskQueue*) [/Users/apple/.nvm/versions/node/v20.20.0/bin/node]
22: 0x102d1f18c v8::internal::MicrotaskQueue::RunMicrotasks(v8::internal::Isolate*) [/Users/apple/.nvm/versions/node/v20.20.0/bin/node]
23: 0x102d1f918 v8::internal::MicrotaskQueue::PerformCheckpoint(v8::Isolate*) [/Users/apple/.nvm/versions/node/v20.20.0/bin/node]
24: 0x102bee560 v8::internal::MaybeHandlev8::internal::Object v8::internal::(anonymous namespace)::HandleApiCallHelper(v8::internal::Isolate*, v8::internal::Handlev8::internal::HeapObject, v8::internal::Handlev8::internal::FunctionTemplateInfo, v8::internal::Handlev8::internal::Object, unsigned long*, int) [/Users/apple/.nvm/versions/node/v20.20.0/bin/node]
25: 0x102beddb0 v8::internal::Builtin_HandleApiCall(int, unsigned long*, v8::internal::Isolate*) [/Users/apple/.nvm/versions/node/v20.20.0/bin/node]
26: 0x103500b24 Builtins_CEntry_Return1_ArgvOnStack_BuiltinExit [/Users/apple/.nvm/versions/node/v20.20.0/bin/node]
27: 0x107ff4da8
28: 0x10347650c Builtins_JSEntryTrampoline [/Users/apple/.nvm/versions/node/v20.20.0/bin/node]
29: 0x1034761f4 Builtins_JSEntry [/Users/apple/.nvm/versions/node/v20.20.0/bin/node]
30: 0x102cf39cc v8::internal::(anonymous namespace)::Invoke(v8::internal::Isolate*, v8::internal::(anonymous namespace)::InvokeParams const&) [/Users/apple/.nvm/versions/node/v20.20.0/bin/node]
31: 0x102cf3260 v8::internal::Execution::Call(v8::internal::Isolate*, v8::internal::Handlev8::internal::Object, v8::internal::Handlev8::internal::Object, int, v8::internal::Handlev8::internal::Object) [/Users/apple/.nvm/versions/node/v20.20.0/bin/node]
32: 0x102b97078 v8::Function::Call(v8::Localv8::Context, v8::Localv8::Value, int, v8::Localv8::Value) [/Users/apple/.nvm/versions/node/v20.20.0/bin/node]
33: 0x1028e0d5c node::InternalCallbackScope::Close() [/Users/apple/.nvm/versions/node/v20.20.0/bin/node]
34: 0x1028e0fb4 node::InternalMakeCallback(node::Environment*, v8::Localv8::Object, v8::Localv8::Object, v8::Localv8::Function, int, v8::Localv8::Value, node::async_context) [/Users/apple/.nvm/versions/node/v20.20.0/bin/node]
35: 0x1028f5470 node::AsyncWrap::MakeCallback(v8::Localv8::Function, int, v8::Localv8::Value) [/Users/apple/.nvm/versions/node/v20.20.0/bin/node]
36: 0x102ab6dac node::StreamBase::CallJSOnreadMethod(long, v8::Localv8::ArrayBuffer, unsigned long, node::StreamBase::StreamBaseJSChecks) [/Users/apple/.nvm/versions/node/v20.20.0/bin/node]
37: 0x102ab8528 node::EmitToJSStreamListener::OnStreamRead(long, uv_buf_t const&) [/Users/apple/.nvm/versions/node/v20.20.0/bin/node]
38: 0x102abcd64 node::LibuvStreamWrap::OnUvRead(long, uv_buf_t const*) [/Users/apple/.nvm/versions/node/v20.20.0/bin/node]
39: 0x102abd47c node::LibuvStreamWrap::ReadStart()::$_1::__invoke(uv_stream_s*, long, uv_buf_t const*) [/Users/apple/.nvm/versions/node/v20.20.0/bin/node]
40: 0x1034636c4 uv__stream_io [/Users/apple/.nvm/versions/node/v20.20.0/bin/node]
41: 0x10346b350 uv__io_poll [/Users/apple/.nvm/versions/node/v20.20.0/bin/node]
42: 0x103458c10 uv_run [/Users/apple/.nvm/versions/node/v20.20.0/bin/node]
43: 0x1028e17e8 node::SpinEventLoopInternal(node::Environment*) [/Users/apple/.nvm/versions/node/v20.20.0/bin/node]
44: 0x102a10d9c node::NodeMainInstance::Run() [/Users/apple/.nvm/versions/node/v20.20.0/bin/node]
45: 0x10298d030 node::Start(int, char**) [/Users/apple/.nvm/versions/node/v20.20.0/bin/node]
46: 0x18e496b98 start [/usr/lib/dyld]

[sidbmw]

I hit the exact same OOM crash — my session JSONL is ~650MB after multiple --continue context compactions.

Root cause: readSessionLog() in sessionScanner.ts calls readFile(path, 'utf-8') which loads the entire file into memory, then .split('\n') doubles it. A 650MB file becomes ~2.6GB+ in V8 heap → OOM.

Same issue in claudeCheckSession() which reads the whole file just to check if one valid message exists.

Fix PR: slopus/happy-cli#160

• Stream-parses JSONL line-by-line with createReadStream + readline (constant memory)
• Caps retained messages at 500 most recent
• Partial 16KB read for session validation

Workaround until merged: You can patch the built dist file directly:

# In ~/.nvm/versions/node/<version>/lib/node_modules/happy-coder/dist/index-B3gQr6vs.mjs
# Replace the readSessionLog function's `file = await readFile(...)` with streaming readline

Or increase the heap: NODE_OPTIONS="--max-old-space-size=8192" happy --continue (temporary, will still be slow)