Niklas Adolfsson
efcea0edab
After some discussion with @kogeler after the we added the rate-limit middleware it may slow down the rpc call timings metrics significantly because it works as follows: 1. The rate limit guard is checked when the call comes and if a slot is available -> process the call 2. If no free spot is available then the call will be sleeping `jitter_delay + min_time_rate_guard` then woken up and checked at most ten times 3. If no spot is available after 10 iterations -> the call is rejected (this may take tens of seconds) Thus, this PR adds a label "is_rate_limited" to filter those out on the metrics "substrate_rpc_calls_time" and "substrate_rpc_calls_finished". I had to merge two middleware layers Metrics and RateLimit to avoid shared state in a hacky way. --------- Co-authored-by: James Wilson <james@jsdw.me>
Substrate
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