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Merge pull request #16247 from Chocobo1/count_bits

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Speed up piece relevance calculation
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Chocobo1 2022-01-25 12:11:36 +08:00 committed by GitHub
commit 9553afc3c2
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2 changed files with 9 additions and 21 deletions
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28
src/base/bittorrent/peerinfo.cpp
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@ -39,8 +39,8 @@ using namespace BitTorrent;
PeerInfo::PeerInfo(const Torrent *torrent, const lt::peer_info &nativeInfo) PeerInfo::PeerInfo(const Torrent *torrent, const lt::peer_info &nativeInfo)
: m_nativeInfo(nativeInfo) : m_nativeInfo(nativeInfo)
, m_relevance(calcRelevance(torrent))
{ {
calcRelevance(torrent);
determineFlags(); determineFlags();
} }
@ -226,28 +226,16 @@ QString PeerInfo::connectionType() const
: QLatin1String {"Web"}; : QLatin1String {"Web"};
} }
void PeerInfo::calcRelevance(const Torrent *torrent) qreal PeerInfo::calcRelevance(const Torrent *torrent) const
{ {
const QBitArray allPieces = torrent->pieces(); const QBitArray allPieces = torrent->pieces();
const int localMissing = allPieces.count(false);
if (localMissing <= 0)
return 0;
const QBitArray peerPieces = pieces(); const QBitArray peerPieces = pieces();
const int remoteHaves = (peerPieces & (~allPieces)).count(true);
int localMissing = 0; return static_cast<qreal>(remoteHaves) / localMissing;
int remoteHaves = 0;
for (int i = 0; i < allPieces.size(); ++i)
{
if (!allPieces[i])
{
++localMissing;
if (peerPieces[i])
++remoteHaves;
}
}
if (localMissing == 0)
m_relevance = 0.0;
else
m_relevance = static_cast<qreal>(remoteHaves) / localMissing;
} }
qreal PeerInfo::relevance() const qreal PeerInfo::relevance() const

2
src/base/bittorrent/peerinfo.h
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@ -92,7 +92,7 @@ namespace BitTorrent
int downloadingPieceIndex() const; int downloadingPieceIndex() const;
private: private:
void calcRelevance(const Torrent *torrent); qreal calcRelevance(const Torrent *torrent) const;
void determineFlags(); void determineFlags();
lt::peer_info m_nativeInfo = {}; lt::peer_info m_nativeInfo = {};