Simple test to measure the speed of bcrypt in Go for each of the supported costs.
Install
go get -u github.com/nsmithuk/bcrypt-cost-goRun
$GOPATH/bin/bcrypt-cost-goRun on the cheapest 'High CPU' Digital Ocean virtual machine.
| Cost | Time to hash password |
|---|---|
| 4 | 3.193709ms |
| 5 | 6.03618ms |
| 6 | 11.258473ms |
| 7 | 20.273336ms |
| 8 | 34.605597ms |
| 9 | 56.568637ms |
| 10 | 86.246206ms |
| 11 | 144.570113ms |
| 12 | 289.117209ms |
| 13 | 577.527173ms |
| 14 | 1.155819422s |
| 15 | 2.311880633s |
| 16 | 4.625168556s |
| 17 | 9.251611191s |
| 18 | 18.4832305s |
| 19 | 37.10841037s |
| 20 | 1m 14.077770059s |
| 21 | 2m 28.111918885s |
| 22 | 4m 56.326662123s |
| 23 | 9m 51.933949103s |
| 24 | 19m 45.156559968s |
| 25 | 39m 29.474770423s |
| 26 | 1h 20m2 4.538693859s |
| 27 | 2h 39m 41.19676742s |
| 28 | 5h 9m 57.203482634s |
| 29 | 10h 32m 4.413076565s |
| 30 | 19h 59m 30.093452502s |
| 31 | 40h 55m 38.340977971s |