Christian Simon
a1f2d0e205
Prometheus: Reduce allocations parsing exemplars (#58959)
* Prometheus: Reduce allocations parsing exemplars
This reduces allocations for parsing exemplars.
name old time/op new time/op delta
ExemplarJson-8 24.7ms ±15% 17.6ms ± 2% -28.72% (p=0.008 n=5+5)
name old alloc/op new alloc/op delta
ExemplarJson-8 4.70MB ± 0% 3.58MB ± 0% -23.79% (p=0.008 n=5+5)
name old allocs/op new allocs/op delta
ExemplarJson-8 72.6k ± 0% 69.1k ± 0% -4.81% (p=0.008 n=5+5)
* Ensure pairs is reset