##// END OF EJS Templates
Optimize manifest.add...
mason@suse.com -
r1534:80a3d6a0 default
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@@ -9,13 +9,12 b' import sys, struct'
9 from revlog import *
9 from revlog import *
10 from i18n import gettext as _
10 from i18n import gettext as _
11 from demandload import *
11 from demandload import *
12 demandload(globals(), "bisect")
12 demandload(globals(), "bisect array")
13
13
14 class manifest(revlog):
14 class manifest(revlog):
15 def __init__(self, opener):
15 def __init__(self, opener):
16 self.mapcache = None
16 self.mapcache = None
17 self.listcache = None
17 self.listcache = None
18 self.addlist = None
19 revlog.__init__(self, opener, "00manifest.i", "00manifest.d")
18 revlog.__init__(self, opener, "00manifest.i", "00manifest.d")
20
19
21 def read(self, node):
20 def read(self, node):
@@ -25,8 +24,9 b' class manifest(revlog):'
25 text = self.revision(node)
24 text = self.revision(node)
26 map = {}
25 map = {}
27 flag = {}
26 flag = {}
28 self.listcache = (text, text.splitlines(1))
27 self.listcache = array.array('c', text)
29 for l in self.listcache[1]:
28 lines = text.splitlines(1)
29 for l in lines:
30 (f, n) = l.split('\0')
30 (f, n) = l.split('\0')
31 map[f] = bin(n[:40])
31 map[f] = bin(n[:40])
32 flag[f] = (n[40:-1] == "x")
32 flag[f] = (n[40:-1] == "x")
@@ -39,57 +39,67 b' class manifest(revlog):'
39 self.read(node)
39 self.read(node)
40 return self.mapcache[2]
40 return self.mapcache[2]
41
41
42 def diff(self, a, b):
43 return mdiff.textdiff(str(a), str(b))
44
42 def add(self, map, flags, transaction, link, p1=None, p2=None,
45 def add(self, map, flags, transaction, link, p1=None, p2=None,
43 changed=None):
46 changed=None):
44 # directly generate the mdiff delta from the data collected during
47
45 # the bisect loop below
48 # returns a tuple (start, end). If the string is found
46 def gendelta(delta):
49 # m[start:end] are the line containing that string. If start == end
47 i = 0
50 # the string was not found and they indicate the proper sorted
48 result = []
51 # insertion point. This was taken from bisect_left, and modified
49 while i < len(delta):
52 # to find line start/end as it goes along.
50 start = delta[i][2]
53 #
51 end = delta[i][3]
54 # m should be a buffer or a string
52 l = delta[i][4]
55 # s is a string
53 if l == None:
56 #
54 l = ""
57 def manifestsearch(m, s, lo=0, hi=None):
55 while i < len(delta) - 1 and start <= delta[i+1][2] \
58 def advance(i, c):
56 and end >= delta[i+1][2]:
59 while i < lenm and m[i] != c:
57 if delta[i+1][3] > end:
58 end = delta[i+1][3]
59 if delta[i+1][4]:
60 l += delta[i+1][4]
61 i += 1
60 i += 1
62 result.append(struct.pack(">lll", start, end, len(l)) + l)
61 return i
63 i += 1
62 lenm = len(m)
64 return result
63 if not hi:
64 hi = lenm
65 while lo < hi:
66 mid = (lo + hi) // 2
67 start = mid
68 while start > 0 and m[start-1] != '\n':
69 start -= 1
70 end = advance(start, '\0')
71 if m[start:end] < s:
72 # we know that after the null there are 40 bytes of sha1
73 # this translates to the bisect lo = mid + 1
74 lo = advance(end + 40, '\n') + 1
75 else:
76 # this translates to the bisect hi = mid
77 hi = start
78 end = advance(lo, '\0')
79 found = m[lo:end]
80 if cmp(s, found) == 0:
81 # we know that after the null there are 40 bytes of sha1
82 end = advance(end + 40, '\n')
83 return (lo, end+1)
84 else:
85 return (lo, lo)
65
86
66 # apply the changes collected during the bisect loop to our addlist
87 # apply the changes collected during the bisect loop to our addlist
67 def addlistdelta(addlist, delta):
88 # return a delta suitable for addrevision
68 # apply the deltas to the addlist. start from the bottom up
89 def addlistdelta(addlist, x):
90 # start from the bottom up
69 # so changes to the offsets don't mess things up.
91 # so changes to the offsets don't mess things up.
70 i = len(delta)
92 i = len(x)
71 while i > 0:
93 while i > 0:
72 i -= 1
94 i -= 1
73 start = delta[i][0]
95 start = x[i][0]
74 end = delta[i][1]
96 end = x[i][1]
75 if delta[i][4]:
97 if x[i][2]:
76 addlist[start:end] = [delta[i][4]]
98 addlist[start:end] = array.array('c', x[i][2])
77 else:
99 else:
78 del addlist[start:end]
100 del addlist[start:end]
79 return addlist
101 return "".join([struct.pack(">lll", d[0], d[1], len(d[2])) + d[2] \
80
102 for d in x ])
81 # calculate the byte offset of the start of each line in the
82 # manifest
83 def calcoffsets(addlist):
84 offsets = [0] * (len(addlist) + 1)
85 offset = 0
86 i = 0
87 while i < len(addlist):
88 offsets[i] = offset
89 offset += len(addlist[i])
90 i += 1
91 offsets[i] = offset
92 return offsets
93
103
94 # if we're using the listcache, make sure it is valid and
104 # if we're using the listcache, make sure it is valid and
95 # parented by the same node we're diffing against
105 # parented by the same node we're diffing against
@@ -98,15 +108,13 b' class manifest(revlog):'
98 files = map.keys()
108 files = map.keys()
99 files.sort()
109 files.sort()
100
110
101 self.addlist = ["%s\000%s%s\n" %
111 text = ["%s\000%s%s\n" %
102 (f, hex(map[f]), flags[f] and "x" or '')
112 (f, hex(map[f]), flags[f] and "x" or '')
103 for f in files]
113 for f in files]
114 self.listcache = array.array('c', "".join(text))
104 cachedelta = None
115 cachedelta = None
105 else:
116 else:
106 addlist = self.listcache[1]
117 addlist = self.listcache
107
108 # find the starting offset for each line in the add list
109 offsets = calcoffsets(addlist)
110
118
111 # combine the changed lists into one list for sorting
119 # combine the changed lists into one list for sorting
112 work = [[x, 0] for x in changed[0]]
120 work = [[x, 0] for x in changed[0]]
@@ -114,45 +122,52 b' class manifest(revlog):'
114 work.sort()
122 work.sort()
115
123
116 delta = []
124 delta = []
117 bs = 0
125 dstart = None
126 dend = None
127 dline = [""]
128 start = 0
129 # zero copy representation of addlist as a buffer
130 addbuf = buffer(addlist)
118
131
132 # start with a readonly loop that finds the offset of
133 # each line and creates the deltas
119 for w in work:
134 for w in work:
120 f = w[0]
135 f = w[0]
121 # bs will either be the index of the item or the insert point
136 # bs will either be the index of the item or the insert point
122 bs = bisect.bisect(addlist, f, bs)
137 start, end = manifestsearch(addbuf, f, start)
123 if bs < len(addlist):
124 fn = addlist[bs][:addlist[bs].index('\0')]
125 else:
126 fn = None
127 if w[1] == 0:
138 if w[1] == 0:
128 l = "%s\000%s%s\n" % (f, hex(map[f]),
139 l = "%s\000%s%s\n" % (f, hex(map[f]),
129 flags[f] and "x" or '')
140 flags[f] and "x" or '')
130 else:
141 else:
131 l = None
142 l = ""
132 start = bs
143 if start == end and w[1] == 1:
133 if fn != f:
144 # item we want to delete was not found, error out
134 # item not found, insert a new one
145 raise AssertionError(
135 end = bs
136 if w[1] == 1:
137 raise AssertionError(
138 _("failed to remove %s from manifest\n") % f)
146 _("failed to remove %s from manifest\n") % f)
147 if dstart != None and dstart <= start and dend >= start:
148 if dend < end:
149 dend = end
150 if l:
151 dline.append(l)
139 else:
152 else:
140 # item is found, replace/delete the existing line
153 if dstart != None:
141 end = bs + 1
154 delta.append([dstart, dend, "".join(dline)])
142 delta.append([start, end, offsets[start], offsets[end], l])
155 dstart = start
156 dend = end
157 dline = [l]
143
158
144 self.addlist = addlistdelta(addlist, delta)
159 if dstart != None:
145 if self.mapcache[0] == self.tip():
160 delta.append([dstart, dend, "".join(dline)])
146 cachedelta = "".join(gendelta(delta))
161 # apply the delta to the addlist, and get a delta for addrevision
147 else:
162 cachedelta = addlistdelta(addlist, delta)
148 cachedelta = None
149
163
150 text = "".join(self.addlist)
164 # the delta is only valid if we've been processing the tip revision
151 if cachedelta and mdiff.patch(self.listcache[0], cachedelta) != text:
165 if self.mapcache[0] != self.tip():
152 raise AssertionError(_("manifest delta failure\n"))
166 cachedelta = None
153 n = self.addrevision(text, transaction, link, p1, p2, cachedelta)
167 self.listcache = addlist
168
169 n = self.addrevision(buffer(self.listcache), transaction, link, p1, \
170 p2, cachedelta)
154 self.mapcache = (n, map, flags)
171 self.mapcache = (n, map, flags)
155 self.listcache = (text, self.addlist)
156 self.addlist = None
157
172
158 return n
173 return n
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