Optimize SubscribeCommitteeSubnets VC action
#13702
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james-prysm
reviewed
Mar 7, 2024
| @@ -3899,7 +3899,7 @@ var file_proto_prysm_v1alpha1_beacon_block_proto_rawDesc = []byte{ | |||
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Why was this file changed if no proto changed?
nalepae
reviewed
Mar 8, 2024
| @@ -537,6 +537,8 @@ message DutiesResponse { | |||
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| // Whether the validator belongs in the sync committee and has to perform sync committee duty. | |||
| bool is_sync_committee = 8; | |||
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| uint64 committees_at_slot = 9; | |||
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All other values in this file have a comment.
| @@ -95,6 +95,11 @@ func (c beaconApiValidatorClient) getDutiesForEpoch( | |||
| if err != nil { | |||
| return nil, errors.Wrapf(err, "failed to get committees for epoch `%d`", epoch) | |||
| } | |||
| slotCommittees := make(map[string]uint64) | |||
| for _, c := range committees { | |||
| n := slotCommittees[c.Slot] | |||
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Even if this works correctly, I think it would be better to explicitly handle the case where c.Slot is not in slotCommittees, instead of relying on the default missing value of uint64.
Something like
for _, c := range committees {
n, ok := slotCommittees[c.Slot]
if !ok {
n = 0
}
slotCommittees[c.Slot] = n + 1
}
nalepae
approved these changes
Mar 8, 2024
github-merge-queue
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removed this pull request from the merge queue due to no response for status checks
james-prysm
approved these changes
Mar 8, 2024
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What type of PR is this?
Other
What does this PR do? Why is it needed?
SubscribeCommitteeSubnetsin the REST VC takes around 1-2 seconds. Almost all of this time is spend on fetching duties to get the number of committees in a slot, but we already return this value when fetching duties at the beginning of the epoch, we just need to pass it into the function. Addingcommittees_at_slotto the duty proto message allows us to have this value available.This reduces the time needed to subscribe from 1-2 seconds to 1 millisecond.