sync: add new Map method Swap, CompareAndSwap, CompareAndDelete

sync: add new Map method Swap, CompareAndSwap, CompareAndDelete

name                                                   time/op
SwapCollision/*sync_test.DeepCopyMap-8                  235ns ± 0%
SwapCollision/*sync_test.RWMutexMap-8                   145ns ± 0%
SwapCollision/*sync.Map-8                               153ns ± 0%
SwapMostlyHits/*sync_test.DeepCopyMap-8                48.2µs ± 0%
SwapMostlyHits/*sync_test.RWMutexMap-8                  190ns ± 0%
SwapMostlyHits/*sync.Map-8                             28.3ns ± 0%
SwapMostlyMisses/*sync_test.DeepCopyMap-8               681ns ± 0%
SwapMostlyMisses/*sync_test.RWMutexMap-8                336ns ± 0%
SwapMostlyMisses/*sync.Map-8                            523ns ± 0%
CompareAndSwapCollision/*sync_test.DeepCopyMap-8       3.99ns ± 0%
CompareAndSwapCollision/*sync_test.RWMutexMap-8         151ns ± 0%
CompareAndSwapCollision/*sync.Map-8                    21.6ns ± 0%
CompareAndSwapNoExistingKey/*sync_test.DeepCopyMap-8   3.95ns ± 0%
CompareAndSwapNoExistingKey/*sync_test.RWMutexMap-8     126ns ± 0%
CompareAndSwapNoExistingKey/*sync.Map-8                6.11ns ± 0%
CompareAndSwapValueNotEqual/*sync_test.DeepCopyMap-8   2.15ns ± 0%
CompareAndSwapValueNotEqual/*sync_test.RWMutexMap-8     132ns ± 0%
CompareAndSwapValueNotEqual/*sync.Map-8                5.32ns ± 0%
CompareAndSwapMostlyHits/*sync_test.RWMutexMap-8        219ns ± 0%
CompareAndSwapMostlyHits/*sync.Map-8                   27.1ns ± 0%
CompareAndSwapMostlyMisses/*sync_test.DeepCopyMap-8    13.0ns ± 0%
CompareAndSwapMostlyMisses/*sync_test.RWMutexMap-8      147ns ± 0%
CompareAndSwapMostlyMisses/*sync.Map-8                 19.6ns ± 0%
CompareAndDeleteCollision/*sync_test.DeepCopyMap-8     2.23ns ± 0%
CompareAndDeleteCollision/*sync_test.RWMutexMap-8       131ns ± 0%
CompareAndDeleteCollision/*sync.Map-8                  16.2ns ± 0%
CompareAndDeleteMostlyHits/*sync_test.RWMutexMap-8      367ns ± 0%
CompareAndDeleteMostlyHits/*sync.Map-8                 33.1ns ± 0%
CompareAndDeleteMostlyMisses/*sync_test.DeepCopyMap-8  8.75ns ± 0%
CompareAndDeleteMostlyMisses/*sync_test.RWMutexMap-8    134ns ± 0%
CompareAndDeleteMostlyMisses/*sync.Map-8               10.9ns ± 0%

name                                                   alloc/op
SwapCollision/*sync_test.DeepCopyMap-8                   336B ± 0%
SwapCollision/*sync_test.RWMutexMap-8                   0.00B
SwapCollision/*sync.Map-8                               16.0B ± 0%
SwapMostlyHits/*sync_test.DeepCopyMap-8                82.1kB ± 0%
SwapMostlyHits/*sync_test.RWMutexMap-8                  12.0B ± 0%
SwapMostlyHits/*sync.Map-8                              28.0B ± 0%
SwapMostlyMisses/*sync_test.DeepCopyMap-8                713B ± 0%
SwapMostlyMisses/*sync_test.RWMutexMap-8                23.0B ± 0%
SwapMostlyMisses/*sync.Map-8                             129B ± 0%
CompareAndSwapCollision/*sync_test.DeepCopyMap-8        0.00B
CompareAndSwapCollision/*sync_test.RWMutexMap-8         0.00B
CompareAndSwapCollision/*sync.Map-8                     3.00B ± 0%
CompareAndSwapNoExistingKey/*sync_test.DeepCopyMap-8    8.00B ± 0%
CompareAndSwapNoExistingKey/*sync_test.RWMutexMap-8     8.00B ± 0%
CompareAndSwapNoExistingKey/*sync.Map-8                 8.00B ± 0%
CompareAndSwapValueNotEqual/*sync_test.DeepCopyMap-8    0.00B
CompareAndSwapValueNotEqual/*sync_test.RWMutexMap-8     0.00B
CompareAndSwapValueNotEqual/*sync.Map-8                 0.00B
CompareAndSwapMostlyHits/*sync_test.RWMutexMap-8        18.0B ± 0%
CompareAndSwapMostlyHits/*sync.Map-8                    33.0B ± 0%
CompareAndSwapMostlyMisses/*sync_test.DeepCopyMap-8     24.0B ± 0%
CompareAndSwapMostlyMisses/*sync_test.RWMutexMap-8      23.0B ± 0%
CompareAndSwapMostlyMisses/*sync.Map-8                  23.0B ± 0%
CompareAndDeleteCollision/*sync_test.DeepCopyMap-8      0.00B
CompareAndDeleteCollision/*sync_test.RWMutexMap-8       0.00B
CompareAndDeleteCollision/*sync.Map-8                   0.00B
CompareAndDeleteMostlyHits/*sync_test.RWMutexMap-8      23.0B ± 0%
CompareAndDeleteMostlyHits/*sync.Map-8                  39.0B ± 0%
CompareAndDeleteMostlyMisses/*sync_test.DeepCopyMap-8   16.0B ± 0%
CompareAndDeleteMostlyMisses/*sync_test.RWMutexMap-8    15.0B ± 0%
CompareAndDeleteMostlyMisses/*sync.Map-8                15.0B ± 0%

name                                                   allocs/op
SwapCollision/*sync_test.DeepCopyMap-8                   2.00 ± 0%
SwapCollision/*sync_test.RWMutexMap-8                    0.00
SwapCollision/*sync.Map-8                                1.00 ± 0%
SwapMostlyHits/*sync_test.DeepCopyMap-8                  4.00 ± 0%
SwapMostlyHits/*sync_test.RWMutexMap-8                   1.00 ± 0%
SwapMostlyHits/*sync.Map-8                               2.00 ± 0%
SwapMostlyMisses/*sync_test.DeepCopyMap-8                6.00 ± 0%
SwapMostlyMisses/*sync_test.RWMutexMap-8                 2.00 ± 0%
SwapMostlyMisses/*sync.Map-8                             6.00 ± 0%
CompareAndSwapCollision/*sync_test.DeepCopyMap-8         0.00
CompareAndSwapCollision/*sync_test.RWMutexMap-8          0.00
CompareAndSwapCollision/*sync.Map-8                      0.00
CompareAndSwapNoExistingKey/*sync_test.DeepCopyMap-8     1.00 ± 0%
CompareAndSwapNoExistingKey/*sync_test.RWMutexMap-8      0.00
CompareAndSwapNoExistingKey/*sync.Map-8                  1.00 ± 0%
CompareAndSwapValueNotEqual/*sync_test.DeepCopyMap-8     0.00
CompareAndSwapValueNotEqual/*sync_test.RWMutexMap-8      0.00
CompareAndSwapValueNotEqual/*sync.Map-8                  0.00
CompareAndSwapMostlyHits/*sync_test.RWMutexMap-8         2.00 ± 0%
CompareAndSwapMostlyHits/*sync.Map-8                     3.00 ± 0%
CompareAndSwapMostlyMisses/*sync_test.DeepCopyMap-8      2.00 ± 0%
CompareAndSwapMostlyMisses/*sync_test.RWMutexMap-8       2.00 ± 0%
CompareAndSwapMostlyMisses/*sync.Map-8                   2.00 ± 0%
CompareAndDeleteCollision/*sync_test.DeepCopyMap-8       0.00
CompareAndDeleteCollision/*sync_test.RWMutexMap-8        0.00
CompareAndDeleteCollision/*sync.Map-8                    0.00
CompareAndDeleteMostlyHits/*sync_test.RWMutexMap-8       2.00 ± 0%
CompareAndDeleteMostlyHits/*sync.Map-8                   3.00 ± 0%
CompareAndDeleteMostlyMisses/*sync_test.DeepCopyMap-8    2.00 ± 0%
CompareAndDeleteMostlyMisses/*sync_test.RWMutexMap-8     1.00 ± 0%
CompareAndDeleteMostlyMisses/*sync.Map-8                 1.00 ± 0%

Fixes #51972

Change-Id: I469e71033592997832c3e8ebdad1b8950a70c99c
Reviewed-on: https://go-review.googlesource.com/c/go/+/399094
Run-TryBot: Changkun Ou <mail@changkun.de>
Reviewed-by: Joedian Reid <joedian@golang.org>
Auto-Submit: Bryan Mills <bcmills@google.com>
TryBot-Result: Gopher Robot <gobot@golang.org>
Reviewed-by: Bryan Mills <bcmills@google.com>