Java NIO FileChanel

最新推荐文章于 2023-03-30 09:42:43 发布

转载最新推荐文章于 2023-03-30 09:42:43 发布 · 130 阅读

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CC 4.0 BY-SA版权

原文链接：https://my.oschina.net/u/1389206/blog/793902

文章标签：

#java #python

本文通过实际测试对比了Java中不同方法复制大文件的性能，包括使用path、fileChannel.transferTo()、fileChannel.transferFrom()、fileChannel.map()及BufferedIO等方式，并记录了每种方法所需的耗时。

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参考地址：Java 复制大文件方式（nio2 FileChannel 拷贝文件能力测试）

http://www.cnblogs.com/interdrp/p/3785164.html（好）

path--->path   耗时：49毫秒
pos:1048576
pos:2097152
pos:3145728
pos:4194304
pos:5242880
pos:6291456
pos:7340032
pos:8388608
pos:9437184
pos:10485760
pos:11534336
pos:12582912
pos:13631488
pos:14680064
pos:15728640
pos:16777216
pos:17825792
pos:18874368
pos:19922944
pos:20971520
pos:22020096
pos:23068672
pos:24117248
pos:25165824
pos:26214400
pos:27262976
pos:28311552
pos:29360128
pos:30408704
pos:31457280
pos:32505856
pos:33554432
pos:34603008
pos:35651584
pos:36700160
pos:37748736
pos:38797312
pos:39845888
pos:40894464
pos:41943040
pos:42991616
pos:44040192
pos:45088768
pos:46137344
pos:47185920
pos:48234496
pos:49283072
pos:50331648
pos:51380224
pos:52210373
fileChannel.transferTo()   耗时：46毫秒
pos:1048576
pos:2097152
pos:3145728
pos:4194304
pos:5242880
pos:6291456
pos:7340032
pos:8388608
pos:9437184
pos:10485760
pos:11534336
pos:12582912
pos:13631488
pos:14680064
pos:15728640
pos:16777216
pos:17825792
pos:18874368
pos:19922944
pos:20971520
pos:22020096
pos:23068672
pos:24117248
pos:25165824
pos:26214400
pos:27262976
pos:28311552
pos:29360128
pos:30408704
pos:31457280
pos:32505856
pos:33554432
pos:34603008
pos:35651584
pos:36700160
pos:37748736
pos:38797312
pos:39845888
pos:40894464
pos:41943040
pos:42991616
pos:44040192
pos:45088768
pos:46137344
pos:47185920
pos:48234496
pos:49283072
pos:50331648
pos:51380224
pos:52210373
fileChannel.transferFrom()   耗时：41毫秒
fileChannel.map()   耗时：748毫秒
pos:1048576
pos:2097152
pos:3145728
pos:4194304
pos:5242880
pos:6291456
pos:7340032
pos:8388608
pos:9437184
pos:10485760
pos:11534336
pos:12582912
pos:13631488
pos:14680064
pos:15728640
pos:16777216
pos:17825792
pos:18874368
pos:19922944
pos:20971520
pos:22020096
pos:23068672
pos:24117248
pos:25165824
pos:26214400
pos:27262976
pos:28311552
pos:29360128
pos:30408704
pos:31457280
pos:32505856
pos:33554432
pos:34603008
pos:35651584
pos:36700160
pos:37748736
pos:38797312
pos:39845888
pos:40894464
pos:41943040
pos:42991616
pos:44040192
pos:45088768
pos:46137344
pos:47185920
pos:48234496
pos:49283072
pos:50331648
pos:51380224
pos:52210373
BufferedIO   耗时：127毫秒
copy6   耗时：484毫秒

转载于:https://my.oschina.net/u/1389206/blog/793902