rewrote the piece picker to be more cpu and memory efficient. replaces the concept of sequential-download-threshold with just a sequential download settings
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@@ -1427,7 +1427,7 @@ Its declaration looks like this::
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int upload_limit() const;
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void set_download_limit(int limit) const;
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int download_limit() const;
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void set_sequenced_download_threshold(int threshold) const;
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void set_sequential_download(bool sd) const;
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void set_peer_upload_limit(asio::ip::tcp::endpoint ip, int limit) const;
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void set_peer_download_limit(asio::ip::tcp::endpoint ip, int limit) const;
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@@ -1658,24 +1658,18 @@ limit.
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download, respectively.
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set_sequenced_download_threshold()
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----------------------------------
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set_sequential_download()
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-------------------------
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::
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void set_sequenced_download_threshold(int threshold);
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void set_sequential_download(bool sd);
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sequenced-download threshold is the limit on how popular a piece has to be
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(popular == inverse of rarity) to be downloaded in sequence instead of in
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random (rarest first) order. It can be used to tweak disk performance in
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settings where the random download property is less necessary. For example, if
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the threshold is 10, all pieces which 10 or more peers have, will be downloaded
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in index order. This setting defaults to 100, which means that it is disabled
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in practice.
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Enables or disables *sequential download*. When enabled, the piece picker will pick pieces in sequence
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instead of rarest first.
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Setting this threshold to a very small value will affect the piece distribution
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negatively in the swarm. It should basically only be used in situations where
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the random seeks on the disk is the download bottleneck.
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Enabling sequential download will affect the piece distribution negatively in the swarm. It should be
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used sparingly.
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set_peer_upload_limit() set_peer_download_limit()
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