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speedup calculatePiecePriority(). This should give faster startup for torrents w/lots of files.

This commit is contained in:
Charles Kerr 2008-01-02 20:37:22 +00:00
parent 2b7a82b9a8
commit d417fe8a79
1 changed files with 17 additions and 5 deletions
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22
libtransmission/torrent.c
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@ -220,19 +220,31 @@ pieceHasFile( int piece, const tr_file * file )
static tr_priority_t
calculatePiecePriority ( const tr_torrent * tor,
int piece )
int piece,
int fileHint )
{
int i;
int priority = TR_PRI_LOW;
/* find the first file that has data in this piece */
if( fileHint >= 0 ) {
i = fileHint;
while( i>0 && pieceHasFile( piece, &tor->info.files[i-1] ) )
--i;
} else {
for( i=0; i<tor->info.fileCount; ++i )
if( pieceHasFile( piece, &tor->info.files[i] ) )
break;
}
/* the piece's priority is the max of the priorities
* of all the files in that piece */
for( i=0; i<tor->info.fileCount; ++i )
for( ; i<tor->info.fileCount; ++i )
{
const tr_file * file = &tor->info.files[i];
if( !pieceHasFile( piece, file ) )
continue;
break;
priority = MAX( priority, file->priority );
@ -262,7 +274,7 @@ tr_torrentInitFilePieces( tr_torrent * tor )
}
for( i=0; i<tor->info.pieceCount; ++i )
tor->info.pieces[i].priority = calculatePiecePriority( tor, i );
tor->info.pieces[i].priority = calculatePiecePriority( tor, i, -1 );
}
static void
@ -1065,7 +1077,7 @@ tr_torrentInitFilePriority( tr_torrent * tor,
file = &tor->info.files[fileIndex];
file->priority = priority;
for( i=file->firstPiece; i<=file->lastPiece; ++i )
tor->info.pieces[i].priority = calculatePiecePriority( tor, i );
tor->info.pieces[i].priority = calculatePiecePriority( tor, i, fileIndex );
}
void