tests/test-clone-update-order.t
author Gregory Szorc <gregory.szorc@gmail.com>
Thu, 23 Mar 2017 19:54:59 -0700
branchstable
changeset 31587 ed5b25874d99
parent 25295 701df761aa94
child 34661 eb586ed5d8ce
permissions -rw-r--r--
changegroup: store old heads as a set Previously, the "oldheads" variable was a list. On a repository at Mozilla with 46,492 heads, profiling revealed that list membership testing was dominating execution time of applying small changegroups. This patch converts the list of old heads to a set. This makes membership testing significantly faster. On the aforementioned repository with 46,492 heads: $ hg unbundle <file with 1 changeset> before: 18.535s wall after: 1.303s Consumers of this variable only check for truthiness (`if oldheads`), length (`len(oldheads)`), and (most importantly) item membership (`h not in oldheads` - which occurs twice). So, the change to a set should be safe and suitable for stable. The practical effect of this change is that changegroup application and related operations (like `hg push`) no longer exhibit an O(n^2) CPU explosion as the number of heads grows.
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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  $ hg init
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  $ echo foo > bar
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  $ hg commit -Am default
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  adding bar
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  $ hg up -r null
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  0 files updated, 0 files merged, 1 files removed, 0 files unresolved
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  $ hg branch mine
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  marked working directory as branch mine
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  (branches are permanent and global, did you want a bookmark?)
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  $ echo hello > world
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  $ hg commit -Am hello
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  adding world
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  $ hg up -r null
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  0 files updated, 0 files merged, 1 files removed, 0 files unresolved
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  $ hg branch other
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  marked working directory as branch other
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  $ echo good > bye
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  $ hg commit -Am other
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  adding bye
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  $ hg up -r mine
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  1 files updated, 0 files merged, 1 files removed, 0 files unresolved
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  $ hg clone -U -u . .#other ../b -r 0 -r 1 -r 2 -b other
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  abort: cannot specify both --noupdate and --updaterev
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  [255]
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  $ hg clone -U .#other ../b -r 0 -r 1 -r 2 -b other
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  adding changesets
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  added 3 changesets with 3 changes to 3 files (+2 heads)
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  $ rm -rf ../b
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  $ hg clone -u . .#other ../b -r 0 -r 1 -r 2 -b other
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  updating to branch mine
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  $ rm -rf ../b
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  $ hg clone -u 0 .#other ../b -r 0 -r 1 -r 2 -b other
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  updating to branch default
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  $ rm -rf ../b
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  $ hg clone -u 1 .#other ../b -r 0 -r 1 -r 2 -b other
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  updating to branch mine
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  $ rm -rf ../b
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  $ hg clone -u 2 .#other ../b -r 0 -r 1 -r 2 -b other
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  updating to branch other
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  $ rm -rf ../b
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Test -r mine ... mine is ignored:
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  $ hg clone -u 2 .#other ../b -r mine -r 0 -r 1 -r 2 -b other
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  updating to branch other
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  $ rm -rf ../b
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  $ hg clone .#other ../b -b default -b mine
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  updating to branch default
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  $ rm -rf ../b
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  $ hg clone .#other ../b
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  updating to branch other
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  $ rm -rf ../b
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  $ hg clone -U . ../c -r 1 -r 2 > /dev/null
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  $ hg clone ../c ../b
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  $ rm -rf ../b ../c
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