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jwt: Cache the bcrypt password hash. (#3526)

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Creds don't require secretKeyHash to be calculated
everytime, cache it instead and re-use.

This is an optimization for bcrypt.

Relevant results from the benchmark done locally, negative
value means improvement in this scenario.

```
benchmark                       old ns/op     new ns/op     delta
BenchmarkAuthenticateNode-4     160590992     80125647      -50.11%
BenchmarkAuthenticateWeb-4      160556692     80432144      -49.90%

benchmark                       old allocs     new allocs     delta
BenchmarkAuthenticateNode-4     87             75             -13.79%
BenchmarkAuthenticateWeb-4      87             75             -13.79%

benchmark                       old bytes     new bytes     delta
BenchmarkAuthenticateNode-4     15222         9785          -35.72%
BenchmarkAuthenticateWeb-4      15222         9785          -35.72%
```
This commit is contained in:
Harshavardhana
2017-01-26 16:51:51 -08:00
committed by GitHub
parent 152cdf1c05
commit 85f2b74cfd
13 changed files with 101 additions and 56 deletions
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appveyor.yml
+2 -2
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@@ -35,8 +35,8 @@ test_script:
# Unit tests
- ps: Add-AppveyorTest "Unit Tests" -Outcome Running
- mkdir build\coverage
- go test -timeout 15m -v -race github.com/minio/minio/cmd...
- go test -v -race github.com/minio/minio/pkg...
- go test -timeout 15m -race github.com/minio/minio/cmd...
- go test -race github.com/minio/minio/pkg...
- go test -coverprofile=build\coverage\coverage.txt -covermode=atomic github.com/minio/minio/cmd
- ps: Update-AppveyorTest "Unit Tests" -Outcome Passed