Klaus Post 142c6b11b3 Reduce JWT overhead for internode tokens (#13738) ...

Since JWT tokens remain valid for up to 15 minutes, we 
don't have to regenerate tokens for every call.

Cache tokens for matching access+secret+audience 
for up to 15 seconds.

```
BenchmarkAuthenticateNode/uncached-32         	  270567	      4179 ns/op	    2961 B/op	      33 allocs/op
BenchmarkAuthenticateNode/cached-32           	 7684824	       157.5 ns/op	      48 B/op	       1 allocs/op
```

Reduces internode call allocations a great deal.

2021-11-23 09:51:53 -08:00

5.3 KiB

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