Benchmark Go Channel Performance
How?
1 producer goroutine and P consumer goroutines with P * T channel send/receive operations in total. Each consumer goroutine also sleeps 1 microsecond after receiving an item.
Run as:
git clone https://github.com/shishkander/go-channel-benchmark.git
cd go-channel-benchmark
# To vary parameters, do:
# $TEXTEDITOR main.go
go run main.go
How to read result tables
- Columns are number of channel receive operations per goroutine. The none column shows the cost of setting up and dismantling of goroutines, which is insignificant in other columns.
- Rows are sizes of the channel.
- Values is the time in microseconds per 1 send/receive operation. numbers are not important though, only their relation.
- GOMAXPROCS means how many goroutines can really run in parallel.
- Consumers is the number of consuming goroutines.
Results
GOMAXPROCS = 04, Producers = 01, Consumers = 01
|===================================================================|
| buf\tasks | none | 50 | 100 | 150 | 250 | 400 | 800 |
|===================================================================|
| unbuf | 5.2 | 18.7 | 18.6 | 18.3 | 18.5 | 18.4 | 18.1 |
| 50 | 4.8 | 50.8 | 38.6 | 30.2 | 24.4 | 19.9 | 17.1 |
| 100 | 5.2 | 51.3 | 57.5 | 45.1 | 34.1 | 27.9 | 21.5 |
| 150 | 5.1 | 51.2 | 57.1 | 57.3 | 42.2 | 36.0 | 24.6 |
| 250 | 4.9 | 53.0 | 57.4 | 57.5 | 59.9 | 44.5 | 30.3 |
| 400 | 5.1 | 52.5 | 56.7 | 57.2 | 57.8 | 61.6 | 39.2 |
| 800 | 5.0 | 50.9 | 57.3 | 58.4 | 60.5 | 58.9 | 59.1 |
|===================================================================|
GOMAXPROCS = 04, Producers = 01, Consumers = 02
|===================================================================|
| buf\tasks | none | 100 | 200 | 300 | 500 | 800 | 1600 |
|===================================================================|
| unbuf | 4.3 | 14.7 | 13.5 | 13.4 | 13.4 | 13.4 | 13.1 |
| 50 | 5.6 | 17.8 | 14.3 | 12.7 | 10.9 | 9.1 | 7.5 |
| 100 | 5.8 | 21.6 | 17.0 | 14.7 | 12.2 | 9.7 | 7.6 |
| 150 | 5.9 | 21.4 | 19.6 | 17.0 | 13.5 | 11.1 | 8.5 |
| 250 | 5.9 | 21.5 | 21.4 | 20.1 | 16.1 | 12.7 | 9.6 |
| 400 | 5.7 | 21.5 | 20.9 | 21.4 | 20.1 | 15.7 | 10.7 |
| 800 | 6.0 | 21.7 | 22.0 | 21.2 | 21.0 | 21.3 | 14.6 |
|===================================================================|
GOMAXPROCS = 04, Producers = 01, Consumers = 03
|===================================================================|
| buf\tasks | none | 150 | 300 | 450 | 750 | 1200 | 2400 |
|===================================================================|
| unbuf | 6.5 | 13.4 | 13.2 | 13.3 | 13.6 | 13.7 | 13.5 |
| 50 | 6.1 | 12.6 | 10.3 | 9.1 | 8.2 | 6.9 | 6.2 |
| 100 | 6.2 | 14.4 | 11.8 | 10.2 | 8.9 | 7.0 | 6.4 |
| 150 | 6.6 | 16.4 | 12.9 | 11.3 | 9.2 | 7.3 | 6.5 |
| 250 | 6.6 | 15.5 | 14.7 | 12.9 | 10.1 | 8.6 | 6.6 |
| 400 | 6.5 | 15.4 | 15.2 | 14.8 | 12.1 | 9.9 | 7.4 |
| 800 | 6.4 | 16.2 | 15.9 | 15.9 | 15.9 | 13.5 | 9.5 |
|===================================================================|
GOMAXPROCS = 03, Producers = 01, Consumers = 01
|===================================================================|
| buf\tasks | none | 50 | 100 | 150 | 250 | 400 | 800 |
|===================================================================|
| unbuf | 4.2 | 16.8 | 15.4 | 16.8 | 16.7 | 17.4 | 16.2 |
| 50 | 4.7 | 51.7 | 37.6 | 28.8 | 23.8 | 19.9 | 15.9 |
| 100 | 4.6 | 51.5 | 54.5 | 43.5 | 32.4 | 25.1 | 19.8 |
| 150 | 4.7 | 51.0 | 54.3 | 58.1 | 43.7 | 31.0 | 20.8 |
| 250 | 4.7 | 50.7 | 54.2 | 56.1 | 59.4 | 43.9 | 30.2 |
| 400 | 5.0 | 52.2 | 57.1 | 58.7 | 59.6 | 61.1 | 40.7 |
| 800 | 5.0 | 52.2 | 57.5 | 58.7 | 60.8 | 61.1 | 61.8 |
|===================================================================|
GOMAXPROCS = 03, Producers = 01, Consumers = 02
|===================================================================|
| buf\tasks | none | 100 | 200 | 300 | 500 | 800 | 1600 |
|===================================================================|
| unbuf | 5.4 | 14.3 | 14.0 | 13.8 | 13.8 | 14.3 | 13.8 |
| 50 | 4.7 | 18.2 | 15.7 | 14.4 | 13.0 | 11.9 | 10.9 |
| 100 | 5.6 | 21.3 | 17.7 | 15.9 | 14.0 | 13.4 | 10.9 |
| 150 | 5.5 | 21.5 | 19.4 | 17.5 | 15.0 | 13.4 | 11.5 |
| 250 | 5.5 | 21.2 | 20.9 | 20.0 | 17.4 | 14.5 | 12.5 |
| 400 | 5.5 | 21.3 | 21.1 | 21.1 | 19.9 | 17.0 | 13.3 |
| 800 | 5.5 | 21.5 | 22.0 | 21.5 | 21.1 | 20.9 | 16.7 |
|===================================================================|
GOMAXPROCS = 03, Producers = 01, Consumers = 03
|===================================================================|
| buf\tasks | none | 150 | 300 | 450 | 750 | 1200 | 2400 |
|===================================================================|
| unbuf | 5.9 | 13.6 | 13.5 | 13.5 | 13.4 | 13.5 | 13.5 |
| 50 | 5.6 | 13.4 | 11.9 | 11.6 | 10.8 | 9.3 | 9.5 |
| 100 | 6.0 | 14.7 | 12.9 | 12.2 | 10.8 | 9.7 | 9.6 |
| 150 | 6.0 | 15.5 | 14.2 | 12.6 | 11.3 | 10.5 | 9.4 |
| 250 | 6.0 | 15.7 | 15.0 | 13.7 | 12.2 | 10.8 | 9.2 |
| 400 | 5.9 | 15.6 | 15.7 | 15.2 | 13.5 | 12.0 | 9.9 |
| 800 | 5.8 | 15.5 | 16.1 | 15.8 | 15.5 | 14.2 | 12.1 |
|===================================================================|
GOMAXPROCS = 02, Producers = 01, Consumers = 01
|===================================================================|
| buf\tasks | none | 50 | 100 | 150 | 250 | 400 | 800 |
|===================================================================|
| unbuf | 4.2 | 20.3 | 19.9 | 19.4 | 20.1 | 19.4 | 20.6 |
| 50 | 4.4 | 53.6 | 38.4 | 32.5 | 27.2 | 23.4 | 21.0 |
| 100 | 4.4 | 54.2 | 58.8 | 46.0 | 35.8 | 29.4 | 23.5 |
| 150 | 4.2 | 55.0 | 57.9 | 60.9 | 44.2 | 34.9 | 26.7 |
| 250 | 4.4 | 55.8 | 59.8 | 59.7 | 61.7 | 44.9 | 31.6 |
| 400 | 4.3 | 55.4 | 58.1 | 59.2 | 60.8 | 61.4 | 40.0 |
| 800 | 4.4 | 55.8 | 60.7 | 61.5 | 62.3 | 60.9 | 61.1 |
|===================================================================|
GOMAXPROCS = 02, Producers = 01, Consumers = 02
|===================================================================|
| buf\tasks | none | 100 | 200 | 300 | 500 | 800 | 1600 |
|===================================================================|
| unbuf | 4.7 | 19.7 | 18.7 | 18.8 | 18.6 | 18.4 | 18.6 |
| 50 | 4.9 | 17.8 | 14.6 | 13.2 | 12.2 | 11.8 | 11.3 |
| 100 | 5.0 | 23.8 | 17.8 | 15.0 | 13.2 | 12.5 | 11.6 |
| 150 | 4.8 | 24.0 | 20.8 | 18.3 | 14.7 | 13.1 | 12.1 |
| 250 | 4.8 | 24.0 | 23.8 | 21.9 | 17.4 | 15.0 | 13.0 |
| 400 | 5.2 | 23.9 | 23.9 | 23.8 | 21.3 | 17.7 | 14.2 |
| 800 | 5.1 | 24.1 | 23.8 | 23.8 | 23.9 | 23.8 | 17.4 |
|===================================================================|
GOMAXPROCS = 02, Producers = 01, Consumers = 03
|===================================================================|
| buf\tasks | none | 150 | 300 | 450 | 750 | 1200 | 2400 |
|===================================================================|
| unbuf | 5.5 | 14.2 | 14.1 | 13.9 | 13.9 | 13.9 | 13.9 |
| 50 | 5.8 | 14.8 | 13.9 | 13.8 | 13.6 | 13.2 | 12.1 |
| 100 | 5.6 | 15.3 | 14.4 | 14.0 | 13.6 | 12.6 | 12.9 |
| 150 | 5.9 | 16.1 | 14.9 | 14.3 | 13.8 | 13.4 | 13.0 |
| 250 | 5.8 | 16.0 | 15.6 | 15.0 | 14.2 | 14.0 | 13.5 |
| 400 | 5.6 | 15.9 | 15.7 | 15.5 | 14.8 | 14.4 | 13.7 |
| 800 | 5.9 | 15.9 | 15.8 | 15.7 | 15.9 | 15.1 | 14.1 |
|===================================================================|
GOMAXPROCS = 01, Producers = 01, Consumers = 01
|===================================================================|
| buf\tasks | none | 50 | 100 | 150 | 250 | 400 | 800 |
|===================================================================|
| unbuf | 1.0 | 15.0 | 15.2 | 15.2 | 14.9 | 15.1 | 14.9 |
| 50 | 1.0 | 59.6 | 32.0 | 21.2 | 14.2 | 10.6 | 8.4 |
| 100 | 1.0 | 59.8 | 60.2 | 43.4 | 27.2 | 18.4 | 10.3 |
| 150 | 1.0 | 60.6 | 59.7 | 61.8 | 37.5 | 24.8 | 14.0 |
| 250 | 1.0 | 61.0 | 57.4 | 60.8 | 61.0 | 39.1 | 20.7 |
| 400 | 1.0 | 61.1 | 60.6 | 60.1 | 60.8 | 57.1 | 31.6 |
| 800 | 1.0 | 60.0 | 60.3 | 57.7 | 60.3 | 58.0 | 57.5 |
|===================================================================|
GOMAXPROCS = 01, Producers = 01, Consumers = 02
|===================================================================|
| buf\tasks | none | 100 | 200 | 300 | 500 | 800 | 1600 |
|===================================================================|
| unbuf | 1.2 | 18.6 | 18.4 | 18.5 | 18.3 | 18.4 | 18.5 |
| 50 | 1.3 | 13.0 | 8.0 | 7.2 | 5.6 | 5.0 | 3.8 |
| 100 | 1.2 | 23.3 | 12.6 | 9.1 | 6.6 | 5.8 | 4.7 |
| 150 | 1.2 | 23.4 | 18.0 | 12.7 | 8.3 | 6.5 | 5.2 |
| 250 | 1.2 | 23.2 | 23.4 | 19.8 | 12.5 | 8.6 | 6.3 |
| 400 | 1.3 | 23.2 | 23.4 | 23.7 | 19.1 | 12.7 | 7.8 |
| 800 | 1.2 | 23.9 | 23.5 | 23.4 | 23.2 | 23.3 | 12.6 |
|===================================================================|
GOMAXPROCS = 01, Producers = 01, Consumers = 03
|===================================================================|
| buf\tasks | none | 150 | 300 | 450 | 750 | 1200 | 2400 |
|===================================================================|
| unbuf | 1.5 | 12.9 | 12.9 | 12.9 | 12.8 | 12.8 | 12.9 |
| 50 | 1.5 | 6.9 | 5.6 | 4.2 | 3.5 | 3.3 | 3.0 |
| 100 | 1.5 | 10.4 | 6.8 | 5.9 | 4.5 | 3.9 | 3.1 |
| 150 | 1.5 | 15.0 | 8.4 | 6.8 | 4.9 | 4.1 | 3.4 |
| 250 | 1.5 | 14.8 | 13.1 | 9.0 | 7.0 | 4.8 | 4.1 |
| 400 | 1.6 | 14.7 | 15.8 | 13.6 | 9.2 | 6.2 | 4.8 |
| 800 | 1.5 | 14.6 | 14.5 | 14.7 | 14.4 | 10.2 | 6.2 |
|===================================================================|
