benchmark: NIOChannelPipeline imitation

[weissi]

adds a benchmark that imitates SwiftNIO's ChannelPipeline. Recently,
Swift master regressed on this benchmark, therefore I believe adding it
to Swift provides value as it seems to be different enough to the existing
benchmarks.

[weissi]

@swift-ci bench

[weissi]

@swift-ci test bench

[CodaFi]

@swift-ci please benchmark

[swift-ci]

Build failed before running benchmark.

[weissi]

@swift-ci please benchmark

[swift-ci]

Build failed before running benchmark.

[weissi]

ok, now I actually compiled that locally :P

[weissi]

@swift-ci please benchmark

[weissi]

@swift-ci please benchmark

[CodaFi]

@swift-ci please benchmark

[swift-ci]

Performance: -O

TEST	OLD	NEW	DELTA	RATIO
Improvement
ObjectiveCBridgeStubFromNSDateRef	2520	2330	-7.5%	1.08x (?)
Added
NIOChannelPipeline	16	16	16	—

Performance: -Osize

TEST	OLD	NEW	DELTA	RATIO
Improvement
Dictionary4	220	167	-24.1%	1.32x
PrefixWhileCountableRangeLazy	15	14	-6.7%	1.07x (?)
Added
NIOChannelPipeline	17	17	17	—

Performance: -Onone

TEST	OLD	NEW	DELTA	RATIO
Regression
DataAppendBytesMedium	3100	3380	+9.0%	0.92x (?)
Added
NIOChannelPipeline	24	24	24	—

✅	Benchmark Check Report
⚠️⏱	NIOChannelPipeline execution took 16 μs. Increase the workload of NIOChannelPipeline to be more than 20 μs.

How to read the data

The tables contain differences in performance which are larger than 8% and differences in code size which are larger than 1%.

If you see any unexpected regressions, you should consider fixing the
regressions before you merge the PR.

Noise: Sometimes the performance results (not code size!) contain false
alarms. Unexpected regressions which are marked with '(?)' are probably noise.
If you see regressions which you cannot explain you can try to run the
benchmarks again. If regressions still show up, please consult with the
performance team (@eeckstein).

Hardware Overview

  Model Name: Mac mini
  Model Identifier: Macmini8,1
  Processor Name: Intel Core i7
  Processor Speed: 3.2 GHz
  Number of Processors: 1
  Total Number of Cores: 6
  L2 Cache (per Core): 256 KB
  L3 Cache: 12 MB
  Memory: 64 GB

[weissi]

@swift-ci please benchmark

[swift-ci]

Performance: -O

TEST	OLD	NEW	DELTA	RATIO
Regression
StringToDataSmall	500	550	+10.0%	0.91x (?)
Added
NIOChannelPipeline	159	159	159	—

Performance: -Osize

TEST	OLD	NEW	DELTA	RATIO
Improvement
Dictionary4	219	167	-23.7%	1.31x (?)
Dictionary4OfObjects	351	328	-6.6%	1.07x (?)
Added
NIOChannelPipeline	174	177	175	—

Performance: -Onone

TEST	OLD	NEW	DELTA	RATIO
Regression
DataCountMedium	45	49	+8.9%	0.92x (?)
Added
NIOChannelPipeline	246	251	248	—

✅	Benchmark Check Report

How to read the data

The tables contain differences in performance which are larger than 8% and differences in code size which are larger than 1%.

If you see any unexpected regressions, you should consider fixing the
regressions before you merge the PR.

Noise: Sometimes the performance results (not code size!) contain false
alarms. Unexpected regressions which are marked with '(?)' are probably noise.
If you see regressions which you cannot explain you can try to run the
benchmarks again. If regressions still show up, please consult with the
performance team (@eeckstein).

Hardware Overview

  Model Name: Mac mini
  Model Identifier: Macmini8,1
  Processor Name: Intel Core i7
  Processor Speed: 3.2 GHz
  Number of Processors: 1
  Total Number of Cores: 6
  L2 Cache (per Core): 256 KB
  L3 Cache: 12 MB
  Memory: 64 GB

[gottesmm]

LGTM

[gottesmm]

@swift-ci smoke test and merge

[gottesmm]

@swift-ci smoke test and merge