[NFC][Python: black] Reformatted the benchmark Python sources using utils/python_format.py.

[Rostepher]

Builds on the changes in #29718.

[Rostepher]

@swift-ci please test

[Rostepher]

@swift-ci please benchmark

[swift-ci]

Performance: -O

Regression	OLD	NEW	DELTA	RATIO
DataAppendDataSmallToSmall	2760	3280	+18.8%	0.84x (?)
FlattenListLoop	2825	3252	+15.1%	0.87x (?)
FlattenListFlatMap	4904	5393	+10.0%	0.91x (?)

Code size: -O

Performance: -Osize

Code size: -Osize

Performance: -Onone

Code size: -swiftlibs

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

[Rostepher]

@swift-ci please test

[Rostepher]

@swift-ci please benchmark

[swift-ci]

Build failed
Swift Test Linux Platform
Git Sha - b965e7705e912f37872b97480f39405097384d6e

[swift-ci]

Build failed
Swift Test OS X Platform
Git Sha - b965e7705e912f37872b97480f39405097384d6e

[swift-ci]

Performance: -O

Improvement	OLD	NEW	DELTA	RATIO
DropLastArray	5	4	-20.0%	1.25x (?)

Code size: -O

Performance: -Osize

Code size: -Osize

Performance: -Onone

Code size: -swiftlibs

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

[Rostepher]

@swift-ci please benchmark

[swift-ci]

Performance: -O

Regression	OLD	NEW	DELTA	RATIO
FlattenListLoop	2676	3185	+19.0%	0.84x (?)
DropFirstArray	13	14	+7.7%	0.93x (?)

Code size: -O

Performance: -Osize

Regression	OLD	NEW	DELTA	RATIO
DropFirstArray	13	14	+7.7%	0.93x (?)

Code size: -Osize

Performance: -Onone

Code size: -swiftlibs

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

[Rostepher]

@swift-ci please test

[Rostepher]

@swift-ci please test

[Rostepher]

@swift-ci please benchmark

[swift-ci]

Performance: -O

Code size: -O

Performance: -Osize

Regression	OLD	NEW	DELTA	RATIO
FlattenListFlatMap	4194	6517	+55.4%	0.64x (?)
ObjectiveCBridgeStubToNSDate2	450	600	+33.3%	0.75x (?)

Code size: -Osize

Performance: -Onone

Code size: -swiftlibs

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 Pro
  Model Identifier: MacPro6,1
  Processor Name: 8-Core Intel Xeon E5
  Processor Speed: 3 GHz
  Number of Processors: 1
  Total Number of Cores: 8
  L2 Cache (per Core): 256 KB
  L3 Cache: 25 MB
  Memory: 64 GB

[swift-ci]

Build failed
Swift Test Linux Platform
Git Sha - b196174

[Rostepher]

@swift-ci please clean test

[palimondo]

I don’t think this was a very good idea. It has created completely unnecessary merge conflicts for me in pending PR #26462 and has significantly hurt the readability of source code in many places. Can we please revert this?
cc @eeckstein @gottesmm