chenBright commented on PR #2577: URL: https://github.com/apache/brpc/pull/2577#issuecomment-2053925132
在FlatMap的基础上支持Multi，以下是在本地运行FlatMapTest.perf得到的性能比较： ``` [ value = 8 bytes ] Sequentially inserting 100 into FlatMap/MultiFlatMap/std::map/butil::PooledMap/std::unordered_map/std::unordered_multimap/butil::hash_map takes 20/20/300/290/2010/210/230 Sequentially erasing 100 from FlatMap/MultiFlatMap/std::map/butil::PooledMap/std::unordered_map/std::unordered_multimap/butil::hash_map takes 20/20/1700/150/160/170/250 Sequentially inserting 1000 into FlatMap/MultiFlatMap/std::map/butil::PooledMap/std::unordered_map/std::unordered_multimap/butil::hash_map takes 16/15/360/342/206/195/219 Sequentially erasing 1000 from FlatMap/MultiFlatMap/std::map/butil::PooledMap/std::unordered_map/std::unordered_multimap/butil::hash_map takes 15/18/178/159/149/159/149 Sequentially inserting 10000 into FlatMap/MultiFlatMap/std::map/butil::PooledMap/std::unordered_map/std::unordered_multimap/butil::hash_map takes 15/15/415/410/200/192/235 Sequentially erasing 10000 from FlatMap/MultiFlatMap/std::map/butil::PooledMap/std::unordered_map/std::unordered_multimap/butil::hash_map takes 14/17/201/181/151/181/154 [ value = 32 bytes ] Sequentially inserting 100 into FlatMap/MultiFlatMap/std::map/butil::PooledMap/std::unordered_map/std::unordered_multimap/butil::hash_map takes 20/10/280/280/250/200/230 Sequentially erasing 100 from FlatMap/MultiFlatMap/std::map/butil::PooledMap/std::unordered_map/std::unordered_multimap/butil::hash_map takes 20/10/2070/150/160/160/160 Sequentially inserting 1000 into FlatMap/MultiFlatMap/std::map/butil::PooledMap/std::unordered_map/std::unordered_multimap/butil::hash_map takes 17/17/330/329/207/185/212 Sequentially erasing 1000 from FlatMap/MultiFlatMap/std::map/butil::PooledMap/std::unordered_map/std::unordered_multimap/butil::hash_map takes 13/17/172/163/146/157/148 Sequentially inserting 10000 into FlatMap/MultiFlatMap/std::map/butil::PooledMap/std::unordered_map/std::unordered_multimap/butil::hash_map takes 17/17/405/406/197/185/215 Sequentially erasing 10000 from FlatMap/MultiFlatMap/std::map/butil::PooledMap/std::unordered_map/std::unordered_multimap/butil::hash_map takes 13/16/206/188/158/168/159 [ value = 128 bytes ] Sequentially inserting 100 into FlatMap/MultiFlatMap/std::map/butil::PooledMap/std::unordered_map/std::unordered_multimap/butil::hash_map takes 20/30/290/290/420/220/250 Sequentially erasing 100 from FlatMap/MultiFlatMap/std::map/butil::PooledMap/std::unordered_map/std::unordered_multimap/butil::hash_map takes 20/10/180/150/160/160/160 Sequentially inserting 1000 into FlatMap/MultiFlatMap/std::map/butil::PooledMap/std::unordered_map/std::unordered_multimap/butil::hash_map takes 22/25/352/349/213/193/222 Sequentially erasing 1000 from FlatMap/MultiFlatMap/std::map/butil::PooledMap/std::unordered_map/std::unordered_multimap/butil::hash_map takes 13/17/170/165/160/171/157 Sequentially inserting 10000 into FlatMap/MultiFlatMap/std::map/butil::PooledMap/std::unordered_map/std::unordered_multimap/butil::hash_map takes 21/24/416/422/210/206/242 Sequentially erasing 10000 from FlatMap/MultiFlatMap/std::map/butil::PooledMap/std::unordered_map/std::unordered_multimap/butil::hash_map takes 16/16/213/190/163/171/159 [ value = 8 bytes ] Randomly inserting 100 into FlatMap/MultiFlatMap/std::map/butil::PooledMap/std::unordered_map/std::unordered_multimap/butil::hash_map takes 20/20/290/260/250/220/220 Randomly erasing 100 from FlatMap/MultiFlatMap/std::map/butil::PooledMap/std::unordered_map/std::unordered_multimap/butil::hash_map takes 20/20/240/220/170/170/180 Randomly inserting 1000 into FlatMap/MultiFlatMap/std::map/butil::PooledMap/std::unordered_map/std::unordered_multimap/butil::hash_map takes 16/15/315/309/206/191/215 Randomly erasing 1000 from FlatMap/MultiFlatMap/std::map/butil::PooledMap/std::unordered_map/std::unordered_multimap/butil::hash_map takes 15/17/258/240/155/193/156 Randomly inserting 10000 into FlatMap/MultiFlatMap/std::map/butil::PooledMap/std::unordered_map/std::unordered_multimap/butil::hash_map takes 15/16/378/363/208/191/210 Randomly erasing 10000 from FlatMap/MultiFlatMap/std::map/butil::PooledMap/std::unordered_map/std::unordered_multimap/butil::hash_map takes 14/16/311/290/162/187/169 [ value = 32 bytes ] Randomly inserting 100 into FlatMap/MultiFlatMap/std::map/butil::PooledMap/std::unordered_map/std::unordered_multimap/butil::hash_map takes 20/20/280/270/240/230/220 Randomly erasing 100 from FlatMap/MultiFlatMap/std::map/butil::PooledMap/std::unordered_map/std::unordered_multimap/butil::hash_map takes 10/20/250/220/170/180/160 Randomly inserting 1000 into FlatMap/MultiFlatMap/std::map/butil::PooledMap/std::unordered_map/std::unordered_multimap/butil::hash_map takes 18/18/310/304/209/192/209 Randomly erasing 1000 from FlatMap/MultiFlatMap/std::map/butil::PooledMap/std::unordered_map/std::unordered_multimap/butil::hash_map takes 13/16/255/247/155/175/152 Randomly inserting 10000 into FlatMap/MultiFlatMap/std::map/butil::PooledMap/std::unordered_map/std::unordered_multimap/butil::hash_map takes 17/17/381/367/209/197/214 Randomly erasing 10000 from FlatMap/MultiFlatMap/std::map/butil::PooledMap/std::unordered_map/std::unordered_multimap/butil::hash_map takes 15/17/310/296/163/188/168 [ value = 128 bytes ] Randomly inserting 100 into FlatMap/MultiFlatMap/std::map/butil::PooledMap/std::unordered_map/std::unordered_multimap/butil::hash_map takes 30/40/300/290/280/230/230 Randomly erasing 100 from FlatMap/MultiFlatMap/std::map/butil::PooledMap/std::unordered_map/std::unordered_multimap/butil::hash_map takes 20/20/230/220/160/180/170 Randomly inserting 1000 into FlatMap/MultiFlatMap/std::map/butil::PooledMap/std::unordered_map/std::unordered_multimap/butil::hash_map takes 29/33/327/329/219/197/220 Randomly erasing 1000 from FlatMap/MultiFlatMap/std::map/butil::PooledMap/std::unordered_map/std::unordered_multimap/butil::hash_map takes 14/16/257/247/159/182/156 Randomly inserting 10000 into FlatMap/MultiFlatMap/std::map/butil::PooledMap/std::unordered_map/std::unordered_multimap/butil::hash_map takes 35/39/398/400/220/213/246 Randomly erasing 10000 from FlatMap/MultiFlatMap/std::map/butil::PooledMap/std::unordered_map/std::unordered_multimap/butil::hash_map takes 35/36/330/319/221/224/200 [ value = 8 bytes ] Seeking 100 from FlatMap/MultiFlatMap/std::map/butil::PooledMap/std::unordered_map/std::unordered_multimap/butil::hash_map takes 10/20/140/130/60/70/50 Seeking 1000 from FlatMap/MultiFlatMap/std::map/butil::PooledMap/std::unordered_map/std::unordered_multimap/butil::hash_map takes 13/13/172/161/77/54/46 Seeking 10000 from FlatMap/MultiFlatMap/std::map/butil::PooledMap/std::unordered_map/std::unordered_multimap/butil::hash_map takes 13/16/216/211/73/56/51 [ value = 32 bytes ] Seeking 100 from FlatMap/MultiFlatMap/std::map/butil::PooledMap/std::unordered_map/std::unordered_multimap/butil::hash_map takes 10/20/130/130/70/60/50 Seeking 1000 from FlatMap/MultiFlatMap/std::map/butil::PooledMap/std::unordered_map/std::unordered_multimap/butil::hash_map takes 13/13/174/163/73/54/49 Seeking 10000 from FlatMap/MultiFlatMap/std::map/butil::PooledMap/std::unordered_map/std::unordered_multimap/butil::hash_map takes 13/13/218/217/75/58/52 [ value = 128 bytes ] Seeking 100 from FlatMap/MultiFlatMap/std::map/butil::PooledMap/std::unordered_map/std::unordered_multimap/butil::hash_map takes 20/10/140/130/80/50/60 Seeking 1000 from FlatMap/MultiFlatMap/std::map/butil::PooledMap/std::unordered_map/std::unordered_multimap/butil::hash_map takes 13/13/173/171/73/55/49 Seeking 10000 from FlatMap/MultiFlatMap/std::map/butil::PooledMap/std::unordered_map/std::unordered_multimap/butil::hash_map takes 26/22/238/252/107/89/91 [ value = 8 bytes ] Seeking 100 from FlatMap/MultiFlatMap/std::map/butil::PooledMap/std::unordered_map/std::unordered_multimap/butil::hash_map takes 20/10/140/130/70/50/60 Seeking 1000 from FlatMap/MultiFlatMap/std::map/butil::PooledMap/std::unordered_map/std::unordered_multimap/butil::hash_map takes 13/14/180/160/68/57/47 Seeking 10000 from FlatMap/MultiFlatMap/std::map/butil::PooledMap/std::unordered_map/std::unordered_multimap/butil::hash_map takes 13/13/221/210/72/57/51 [ value = 32 bytes ] Seeking 100 from FlatMap/MultiFlatMap/std::map/butil::PooledMap/std::unordered_map/std::unordered_multimap/butil::hash_map takes 20/10/140/130/70/60/50 Seeking 1000 from FlatMap/MultiFlatMap/std::map/butil::PooledMap/std::unordered_map/std::unordered_multimap/butil::hash_map takes 13/13/167/160/69/53/50 Seeking 10000 from FlatMap/MultiFlatMap/std::map/butil::PooledMap/std::unordered_map/std::unordered_multimap/butil::hash_map takes 15/14/224/219/75/59/52 [ value = 128 bytes ] Seeking 100 from FlatMap/MultiFlatMap/std::map/butil::PooledMap/std::unordered_map/std::unordered_multimap/butil::hash_map takes 10/10/140/130/80/50/60 Seeking 1000 from FlatMap/MultiFlatMap/std::map/butil::PooledMap/std::unordered_map/std::unordered_multimap/butil::hash_map takes 13/13/170/167/70/54/52 Seeking 10000 from FlatMap/MultiFlatMap/std::map/butil::PooledMap/std::unordered_map/std::unordered_multimap/butil::hash_map takes 26/22/238/240/85/70/67 ``` -- This is an automated message from the Apache Git Service. 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