Mercurial > hg > mercurial-crew-with-dirclash

comparison mercurial/revlog.py @ 4993:4205f626dc05

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lazyindex: speed up __getitem__ This function is fairly performance sensitive, so we make a couple ugly tweaks: - keep all entries packed so we needn't test entry types - fold index lookup/load into unpack call to eliminate local variable setting
author Matt Mackall <mpm@selenic.com>
date Mon, 23 Jul 2007 20:44:08 -0500
parents 0a676643687b
children d36310dd51d7
comparison
equal deleted inserted replaced
4992:0a676643687b 4993:4205f626dc05
234 if pos < 0: 234 if pos < 0:
235 pos += len(self.p.index) 235 pos += len(self.p.index)
236 self.p.loadindex(pos) 236 self.p.loadindex(pos)
237 return self.p.index[pos] 237 return self.p.index[pos]
238 def __getitem__(self, pos): 238 def __getitem__(self, pos):
239 ret = self.p.index[pos] or self.load(pos) 239 return struct.unpack(indexformatng,
240 if isinstance(ret, str): 240 self.p.index[pos] or self.load(pos))
241 ret = struct.unpack(indexformatng, ret)
242 return ret
243 def __setitem__(self, pos, item): 241 def __setitem__(self, pos, item):
244 self.p.index[pos] = item 242 self.p.index[pos] = struct.pack(indexformatng, *item)
245 def __delitem__(self, pos): 243 def __delitem__(self, pos):
246 del self.p.index[pos] 244 del self.p.index[pos]
247 def insert(self, pos, e): 245 def insert(self, pos, e):
248 self.p.index.insert(pos, e) 246 self.p.index.insert(pos, struct.pack(indexformatng, *e))
249 def append(self, e): 247 def append(self, e):
250 self.p.index.append(e) 248 self.p.index.append(struct.pack(indexformatng, *e))
251 249
252 class lazymap(object): 250 class lazymap(object):
253 """a lazy version of the node map""" 251 """a lazy version of the node map"""
254 def __init__(self, parser): 252 def __init__(self, parser):
255 self.p = parser 253 self.p = parser