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revlog: minor chunk speed-up
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parent
d106fa8150
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@ -509,7 +509,7 @@ class revlog(object):
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def parentrevs(self, rev):
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return self.index[rev][5:7]
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def start(self, rev):
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return getoffset(self.index[rev][0])
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return int(self.index[rev][0] >> 16)
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def end(self, rev):
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return self.start(rev) + self.length(rev)
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def length(self, rev):
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@ -845,12 +845,7 @@ class revlog(object):
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return hash(text, p1, p2) != node
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def chunk(self, rev, df=None):
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start, length = self.start(rev), self.length(rev)
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if self._inline:
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start += (rev + 1) * self._io.size
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end = start + length
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def loadcache(df):
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cache_length = max(65536, length)
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if not df:
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if self._inline:
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df = self.opener(self.indexfile)
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@ -859,21 +854,29 @@ class revlog(object):
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df.seek(start)
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self._chunkcache = (start, df.read(cache_length))
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if not self._chunkcache:
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loadcache(df)
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start, length = self.start(rev), self.length(rev)
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if self._inline:
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start += (rev + 1) * self._io.size
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end = start + length
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offset = 0
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if not self._chunkcache:
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cache_length = max(65536, length)
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loadcache(df)
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else:
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cache_start = self._chunkcache[0]
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cache_end = cache_start + len(self._chunkcache[1])
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cache_length = len(self._chunkcache[1])
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cache_end = cache_start + cache_length
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if start >= cache_start and end <= cache_end:
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# it is cached
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offset = start - cache_start
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else:
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cache_length = max(65536, length)
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loadcache(df)
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offset = 0
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# avoid copying large chunks
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c = self._chunkcache[1]
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if len(c) > length:
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if cache_length != length:
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c = c[offset:offset + length]
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return decompress(c)
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