Merge pull request #526 from arvidn/rechecking-outstanding-1.1
always keep at least 2 async hash jobs outstanding
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@ -2682,7 +2682,10 @@ namespace libtorrent
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int num_outstanding = settings().get_int(settings_pack::checking_mem_usage) * block_size()
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/ m_torrent_file->piece_length();
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if (num_outstanding <= 0) num_outstanding = 1;
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// if we only keep a single read operation in-flight at a time, we suffer
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// significant performance degradation. Always keep at least two jobs
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// outstanding
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if (num_outstanding < 2) num_outstanding = 2;
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// we might already have some outstanding jobs, if we were paused and
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// resumed quickly, before the outstanding jobs completed
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