protobuf

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Tag: Branch: Tree: 363e39c171

Commit Graph

Author	SHA1	Message	Date
Joshua Haberman	08b6d2d6fd	Rewrite of the decoder (#263 ) New code is smaller (in both source size and compiled size) and faster. # Speed The decoder speeds up on all machines I tested, though the amount of speedup varies. I was only able to test Intel CPUs. ### Linux Desktop ``` CPU: Intel(R) Core(TM) i7-8700K CPU @ 3.70GHz OS: Linux name old time/op new time/op delta CreateArena 4.72ns ± 0% 4.93ns ± 0% +4.47% (p=0.000 n=11+11) ParseDescriptor 12.4µs ± 1% 9.1µs ± 1% -26.65% (p=0.000 n=11+11) ``` ### Mac Laptop ``` CPU: Intel(R) Core(TM) i7-8850H CPU @ 2.60GHz OS: macOS name old time/op new time/op delta CreateArena 5.33ns ± 3% 5.58ns ± 2% +4.69% (p=0.000 n=12+12) ParseDescriptor 15.0µs ± 2% 11.9µs ± 2% -20.20% (p=0.000 n=12+12) ``` ### Linux Workstation ``` CPU: Intel(R) Xeon(R) Gold 6154 CPU @ 3.00GHz OS: Linux name old time/op new time/op delta CreateArena 5.29ns ± 0% 5.52ns ± 0% +4.37% (p=0.000 n=10+12) ParseDescriptor 18.6µs ± 0% 16.4µs ± 0% -11.54% (p=0.000 n=12+12) ``` # Size A few source files grow marginally because of some arena functionality moved inline. But `upb/decode.c` shrinks by 30% on Linux: ``` VM SIZE -------------- +2.1% +283 upb/json_decode.c +24% +205 upb/msg.c +8.4% +115 upb/upb.c +0.9% +28 upb/reflection.c [ = ] 0 upb/def.c [ = ] 0 upb/encode.c [ = ] 0 upb/json_encode.c [ = ] 0 upb/table.c -30.3% -1.51Ki upb/decode.c -0.7% -738 TOTAL ```	5 years ago

Author

SHA1

Message

Date

Joshua Haberman

08b6d2d6fd

Rewrite of the decoder (#263 )

New code is smaller (in both source size and compiled size) and faster.

# Speed

The decoder speeds up on all machines I tested, though the amount of speedup varies. I was only able to test Intel CPUs.

### Linux Desktop
```
CPU: Intel(R) Core(TM) i7-8700K CPU @ 3.70GHz
OS: Linux

name         	old time/op  new time/op  delta
CreateArena   	 4.72ns ± 0%  4.93ns ± 0%   +4.47%  (p=0.000 n=11+11)
ParseDescriptor  12.4µs ± 1%   9.1µs ± 1%  -26.65%  (p=0.000 n=11+11)
```

### Mac Laptop
```
CPU: Intel(R) Core(TM) i7-8850H CPU @ 2.60GHz
OS: macOS

name             old time/op  new time/op  delta
CreateArena      5.33ns ± 3%  5.58ns ± 2%   +4.69%  (p=0.000 n=12+12)
ParseDescriptor  15.0µs ± 2%  11.9µs ± 2%  -20.20%  (p=0.000 n=12+12)
```

### Linux Workstation
```
CPU: Intel(R) Xeon(R) Gold 6154 CPU @ 3.00GHz
OS: Linux

name             old time/op  new time/op  delta
CreateArena      5.29ns ± 0%  5.52ns ± 0%   +4.37%  (p=0.000 n=10+12)
ParseDescriptor  18.6µs ± 0%  16.4µs ± 0%  -11.54%  (p=0.000 n=12+12)
```

# Size

A few source files grow marginally because of some arena functionality moved inline. But `upb/decode.c` shrinks by 30% on Linux:

```
     VM SIZE    
 -------------- 
  +2.1%    +283    upb/json_decode.c
   +24%    +205    upb/msg.c
  +8.4%    +115    upb/upb.c
  +0.9%     +28    upb/reflection.c
  [ = ]       0    upb/def.c
  [ = ]       0    upb/encode.c
  [ = ]       0    upb/json_encode.c
  [ = ]       0    upb/table.c
 -30.3% -1.51Ki    upb/decode.c
  -0.7%    -738    TOTAL
```

5 years ago

1 Commits (363e39c171a08b89bd546189d1244a6e191cacf0)