From: "Edward Z. Yang" <ezyang@MIT.EDU>
To: sup-devel@rubyforge.org, ezyang@mit.edu
Subject: [sup-devel] [PATCH] Avoid O(n^2) complexity for maildir deduplication.
Date: Wed, 19 Jan 2011 21:44:56 -0500 [thread overview]
Message-ID: <1295491496-1136-1-git-send-email-ezyang@mit.edu> (raw)
Signed-off-by: Edward Z. Yang <ezyang@mit.edu>
---
lib/sup/maildir.rb | 9 ++++++---
1 files changed, 6 insertions(+), 3 deletions(-)
diff --git a/lib/sup/maildir.rb b/lib/sup/maildir.rb
index ba8efed..0898c91 100644
--- a/lib/sup/maildir.rb
+++ b/lib/sup/maildir.rb
@@ -128,14 +128,17 @@ class Maildir < Source
## deleted arrays, meaning that its flags changed or that it has
## been moved, these ids need to be removed from added and deleted
add_to_delete = del_to_delete = []
+ map = {}
added.each do |id_add|
- deleted.each do |id_del|
- if maildir_data(id_add)[0] == maildir_data(id_del)[0]
+ map[maildir_data(id_add)[0]] = id_add
+ end
+ deleted.each do |id_del|
+ id_add = maildir_data(id_del)[0]
+ if not id_add.nil?
updated.push [ id_del, id_add ]
add_to_delete.push id_add
del_to_delete.push id_del
end
- end
end
added -= add_to_delete
deleted -= del_to_delete
--
1.7.0.4
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next reply other threads:[~2011-01-20 3:36 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-01-20 2:44 Edward Z. Yang [this message]
2011-01-20 22:44 Edward Z. Yang
2011-03-13 16:42 ` Damien Leone
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