bdiff: don't check border condition in loop
This is pretty much a copy of d500ddae7494, just to a different loop.
The condition `p == plast` (`plast == a + len - 1`) was only true on
the final iteration of the loop. So it was wasteful to check for it
on every iteration. We decrease the iteration count by 1 and add an
explicit check for `p == plast` after the loop.
Again, we see modest wins.
From the mozilla-unified repository:
$ perfbdiff -m 3041e4d59df2
! wall 0.035502 comb 0.040000 user 0.040000 sys 0.000000 (best of 100)
! wall 0.030480 comb 0.030000 user 0.030000 sys 0.000000 (best of 100)
$ perfbdiff 0e9928989e9c --alldata --count 100
! wall 4.097394 comb 4.100000 user 4.100000 sys 0.000000 (best of 3)
! wall 3.597798 comb 3.600000 user 3.600000 sys 0.000000 (best of 3)
The 2nd example throws a total of ~3.3GB of data at bdiff. This
change increases the throughput from ~811 MB/s to ~924 MB/s.
from __future__ import absolute_import, print_function
from mercurial import (
dispatch,
error,
ui as uimod,
)
testui = uimod.ui()
parsed = dispatch._parseconfig(testui, [
'values.string=string value',
'values.bool1=true',
'values.bool2=false',
'values.boolinvalid=foo',
'values.int1=42',
'values.int2=-42',
'values.intinvalid=foo',
'lists.list1=foo',
'lists.list2=foo bar baz',
'lists.list3=alice, bob',
'lists.list4=foo bar baz alice, bob',
'lists.list5=abc d"ef"g "hij def"',
'lists.list6="hello world", "how are you?"',
'lists.list7=Do"Not"Separate',
'lists.list8="Do"Separate',
'lists.list9="Do\\"NotSeparate"',
'lists.list10=string "with extraneous" quotation mark"',
'lists.list11=x, y',
'lists.list12="x", "y"',
'lists.list13=""" key = "x", "y" """',
'lists.list14=,,,, ',
'lists.list15=" just with starting quotation',
'lists.list16="longer quotation" with "no ending quotation',
'lists.list17=this is \\" "not a quotation mark"',
'lists.list18=\n \n\nding\ndong',
])
print(repr(testui.configitems('values')))
print(repr(testui.configitems('lists')))
print("---")
print(repr(testui.config('values', 'string')))
print(repr(testui.config('values', 'bool1')))
print(repr(testui.config('values', 'bool2')))
print(repr(testui.config('values', 'unknown')))
print("---")
try:
print(repr(testui.configbool('values', 'string')))
except error.ConfigError as inst:
print(inst)
print(repr(testui.configbool('values', 'bool1')))
print(repr(testui.configbool('values', 'bool2')))
print(repr(testui.configbool('values', 'bool2', True)))
print(repr(testui.configbool('values', 'unknown')))
print(repr(testui.configbool('values', 'unknown', True)))
print("---")
print(repr(testui.configint('values', 'int1')))
print(repr(testui.configint('values', 'int2')))
print("---")
print(repr(testui.configlist('lists', 'list1')))
print(repr(testui.configlist('lists', 'list2')))
print(repr(testui.configlist('lists', 'list3')))
print(repr(testui.configlist('lists', 'list4')))
print(repr(testui.configlist('lists', 'list4', ['foo'])))
print(repr(testui.configlist('lists', 'list5')))
print(repr(testui.configlist('lists', 'list6')))
print(repr(testui.configlist('lists', 'list7')))
print(repr(testui.configlist('lists', 'list8')))
print(repr(testui.configlist('lists', 'list9')))
print(repr(testui.configlist('lists', 'list10')))
print(repr(testui.configlist('lists', 'list11')))
print(repr(testui.configlist('lists', 'list12')))
print(repr(testui.configlist('lists', 'list13')))
print(repr(testui.configlist('lists', 'list14')))
print(repr(testui.configlist('lists', 'list15')))
print(repr(testui.configlist('lists', 'list16')))
print(repr(testui.configlist('lists', 'list17')))
print(repr(testui.configlist('lists', 'list18')))
print(repr(testui.configlist('lists', 'unknown')))
print(repr(testui.configlist('lists', 'unknown', '')))
print(repr(testui.configlist('lists', 'unknown', 'foo')))
print(repr(testui.configlist('lists', 'unknown', ['foo'])))
print(repr(testui.configlist('lists', 'unknown', 'foo bar')))
print(repr(testui.configlist('lists', 'unknown', 'foo, bar')))
print(repr(testui.configlist('lists', 'unknown', ['foo bar'])))
print(repr(testui.configlist('lists', 'unknown', ['foo', 'bar'])))
print(repr(testui.config('values', 'String')))
def function():
pass
# values that aren't strings should work
testui.setconfig('hook', 'commit', function)
print(function == testui.config('hook', 'commit'))
# invalid values
try:
testui.configbool('values', 'boolinvalid')
except error.ConfigError:
print('boolinvalid')
try:
testui.configint('values', 'intinvalid')
except error.ConfigError:
print('intinvalid')