protobuf

Protocol Buffers - Google's data interchange format (grpc依赖) https://developers.google.com/protocol-buffers/

Tag: Branch: Tree: 3b62052186

History

Mark Hansen a51f98ce0c Optimise CodedOutputStream.ArrayEncoder.writeFixed32NoTag/writeFixed64NoTag On Android, this generates better assembly code, bounds-checking through all the used indices upfront, and branching to deoptimise if it's not true, avoiding doing 4x bounds checks. We also don't generate 4 different `pThrowArrayBounds` code sections. https://godbolt.org/z/Kbhvcdvbd Code size Comparison: - `void X.writeFixed32NoTag__before(int) [292 bytes]` - `void X.writeFixed32NoTag__after(int) [180 bytes]` This starts by throwing a more meaningful length (4bytes or 8bytes for fixed64), which makes sure the value of position in the catch clause isn't dependent on which line threw the exception. PiperOrigin-RevId: 678543462	6 months ago
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main	Optimise CodedOutputStream.ArrayEncoder.writeFixed32NoTag/writeFixed64NoTag	6 months ago
test	CodedOutputStream: avoid updating position to go beyond end of array.	6 months ago

Mark Hansen a51f98ce0c Optimise CodedOutputStream.ArrayEncoder.writeFixed32NoTag/writeFixed64NoTag

On Android, this generates better assembly code, bounds-checking through all
the used indices upfront, and branching to deoptimise if it's not true,
avoiding doing 4x bounds checks. We also don't generate 4 different
`pThrowArrayBounds` code sections.

https://godbolt.org/z/Kbhvcdvbd

Code size Comparison:
- `void X.writeFixed32NoTag__before(int) [292 bytes]`
- `void X.writeFixed32NoTag__after(int) [180 bytes]`

This starts by throwing a more meaningful length (4bytes or 8bytes for fixed64), which makes sure the value of position in the catch clause isn't dependent on which line threw the exception.

PiperOrigin-RevId: 678543462

6 months ago

main

Optimise CodedOutputStream.ArrayEncoder.writeFixed32NoTag/writeFixed64NoTag

6 months ago

test

CodedOutputStream: avoid updating position to go beyond end of array.

6 months ago