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I'm not sure why we set "full" to true here, but this could be the source of a
whole bunch of bidirectional sync issues. That is, if two peers are syncing off
each other, they could repeatedly "reset" each other's wantlist to "empty".

fix want gauge calculation

Fix PeerManager signalAvailabiity() race

fix: avoid taking accessing the peerQueues without taking the lock

fix: update circleci ci-go

Or, really, just avoid accessing it. We don't need it.

This caused a concurrent map access panic under load.

Quick alternative to #407 to fix the main issue.

If peer is first to send a block to session, protect connection

Ensure sessions register with PeerManager

* feat: total wants gauge

* fix: in gauges count wants regardless of which peers they're sent to

* fix: want block gauge calculation

* refactor: simplify peermanagerwants

Improve peer manager performance

Instead of tracking offsets, just create a "new" slice starting with the
broadcast cancel slice. Under the covers, this will just use the same memory
over and over.

fix: return wants from engine.WantlistForPeer()

chore(deps): bump github.com/libp2p/go-libp2p from 0.6.1 to 0.8.3

Bumps [github.com/libp2p/go-libp2p](https://github.com/libp2p/go-libp2p) from 0.6.1 to 0.8.3.
- [Release notes](https://github.com/libp2p/go-libp2p/releases)
- [Changelog](https://github.com/libp2p/go-libp2p/blob/master/NEWS.md)
- [Commits](https://github.com/libp2p/go-libp2p/compare/v0.6.1...v0.8.3)
Signed-off-by: dependabot-preview[bot] <support@dependabot.com>

calculate message latency

chore(deps): bump github.com/ipfs/go-log from 1.0.2 to 1.0.4

* fix: use one less go-routine per session

* fix: send cancel when GetBlocks() is cancelled (#383)

* fix: send cancel when GetBlocks() is cancelled

* fix: in SessionManager shutdown nil out sessions

* fix: sessionWantSender perf

* make sessionWantSender.SignalAvailability() non-blocking

* Refactor SessionInterestManager (#384)

* refactor: customize SessionInterestManager

* refactor: SessionInterestManager perf

Bumps [github.com/ipfs/go-log](https://github.com/ipfs/go-log) from 1.0.2 to 1.0.4.
- [Release notes](https://github.com/ipfs/go-log/releases)
- [Commits](https://github.com/ipfs/go-log/compare/v1.0.2...v1.0.4)
Signed-off-by: dependabot-preview[bot] <support@dependabot.com>