fixes for the README #95
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This was referenced Jan 8, 2021
darrachequesne
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Jul 4, 2024
When maxHttpBufferSize is large (1e8 bytes), a payload of length 100MB
can be sent like so:
99999991:422222222222222222222222222222222222222222222...
This massive packet can cause OOM via building up many many
`ConsOneByteString` objects due to concatenation:
99999989 `ConsOneByteString`s and then converting the massive integer to
a `Number`.
The performance can be improved to avoid this by using `substring`
rather than building the string via concatenation.
Below I tried one payload of length 7e7 as the 1e8 payload took so
long to process that it timed out before running out of memory.
```
==== JS stack trace =========================================
0: ExitFrame [pc: 0x13c5b79]
Security context: 0x152fe7b808d1 <JSObject>
1: decodeString [0x2dd385fb5d1] [/node_modules/socket.io-parser/index.js:~276] [pc=0xf59746881be](this=0x175d34c42b69 <JSGlobal Object>,0x14eccff10fe1 <Very long string[69999990]>)
2: add [0x31fc2693da29] [/node_modules/socket.io-parser/index.js:242] [bytecode=0xa7ed6554889 offset=11](this=0x0a2881be5069 <Decoder map = 0x3ceaa8bf48c9>,0x14eccff10fe1 <Very...
FATAL ERROR: Ineffective mark-compacts near heap limit Allocation failed - JavaScript heap out of memory
1: 0xa09830 node::Abort() [node]
2: 0xa09c55 node::OnFatalError(char const*, char const*) [node]
3: 0xb7d71e v8::Utils::ReportOOMFailure(v8::internal::Isolate*, char const*, bool) [node]
4: 0xb7da99 v8::internal::V8::FatalProcessOutOfMemory(v8::internal::Isolate*, char const*, bool) [node]
5: 0xd2a1f5 [node]
6: 0xd2a886 v8::internal::Heap::RecomputeLimits(v8::internal::GarbageCollector) [node]
7: 0xd37105 v8::internal::Heap::PerformGarbageCollection(v8::internal::GarbageCollector, v8::GCCallbackFlags) [node]
8: 0xd37fb5 v8::internal::Heap::CollectGarbage(v8::internal::AllocationSpace, v8::internal::GarbageCollectionReason, v8::GCCallbackFlags) [node]
9: 0xd3965f v8::internal::Heap::HandleGCRequest() [node]
10: 0xce8395 v8::internal::StackGuard::HandleInterrupts() [node]
11: 0x1042cb6 v8::internal::Runtime_StackGuard(int, unsigned long*, v8::internal::Isolate*) [node]
12: 0x13c5b79 [node]
```
darrachequesne
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Jul 8, 2024
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Hello all,
These are just a few grammar/consistency/pluralization fixes for the Socket.IO
README.md. The content is unchanged, but the English is a bit more natural.Jed