go-perf-tests

File IO (Write)

Measurements per 10 iterations of each test:

Test file size: 580499010 bytes (~553 Mb)

On SSD, ~1100 Mb/sec measured write speed (disk model: APPLE SSD SM0512G, filesystem: Apple_APFS)

Sync writes:

#	Test name	Test time	~ Mb/sec
1	"File"	30.697027 s	20
2	"BufferedFile"	597.71761 ms	1037 *
3	"AsyncFileWithOneWorker"	1.0990415 s	563 *
4	"AsyncFileWithManyWorkers"	3.1371508 s	197

Async writes:

#	Test name	Test time	~ Mb/sec
1	"FileAsync"	51.1926666 s	12
2	"BufferedFileAsync"	955.282559 ms	648 *
3	"AsyncFileWithOneWorkerAsync"	3.88582015 s	159
4	"AsyncFileWithManyWorkerAsync"	3.97423097 s	156

On HDD (A), ~850 Mb/sec measured write speed

Sync writes:

#	Test name	Test time	~ Mb/sec
1	"File"	8.04336877 s	77
2	"BufferedFile"	847.852385 ms	730 *
3	"AsyncFileWithOneWorker"	1.73917575 s	356 *
4	"AsyncFileWithManyWorkers"	3.49826814 s	177

Async writes:

#	Test name	Test time	~ Mb/sec
1	"FileAsync"	12.6254856 s	49
2	"BufferedFileAsync"	1.88664145 s	328 *
3	"AsyncFileWithOneWorkerAsync"	6.38696083 s	97
4	"AsyncFileWithManyWorkerAsync"	6.74428174 s	92

On HDD (B), ~2400 Mb/sec measured write speed

Sync writes:

#	Test name	Test time	~ Mb/sec
1	"File"	3.07002209 s	202
2	"BufferedFile"	591.654643 ms	1046 *
3	"AsyncFileWithOneWorker"	1.29223321 s	479 *
4	"AsyncFileWithManyWorkers"	2.62231060 s	236

Async writes:

#	Test name	Test time	~ Mb/sec
1	"FileAsync"	6.900129726 s	90
2	"BufferedFileAsync"	1.423837481 s	435 *
3	"AsyncFileWithOneWorkerAsync"	4.687618345 s	132
4	"AsyncFileWithManyWorkerAsync"	5.572252003 s	111