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Feature #13896
closed
Find.find -> Use Dir.children instead of Dir.entries
Status:
Closed
Assignee:
-
Target version:
-
Description
Dir.children is available since Feature #11302. Find.find can
use of the new list (having no '.' neither '..' entries), making
now superflous an if statement.
This change can improve the performance of Find.find when the path
has lots of entries (thousands?).
Some profiling I did using 50,000 files on a given folder, using this code:
total_size = 0
Find.find(ENV["HOME"]) do |path|
if FileTest.directory?(path)
if File.basename(path)[0] == ?.
Find.prune # Don't look any further into this directory.
else
next
end
else
total_size += FileTest.size(path)
end
end
end
Before the patch
~/ruby -rprofile before.rb
% cumulative self self total
time seconds seconds calls ms/call ms/call name
48.37 9.24 9.24 100014 0.09 0.60 Find.find
13.52 11.82 2.58 50005 0.05 0.07 nil#
5.17 12.81 0.99 50005 0.02 0.35 Kernel#catch
5.05 13.77 0.96 50006 0.02 0.04 Kernel#dup
4.96 14.72 0.95 50006 0.02 0.02 Kernel#initialize_dup
3.87 15.46 0.74 1 738.89 5952.54 Array#reverse_each
2.39 15.92 0.46 100012 0.00 0.00 String#==
1.98 16.29 0.38 50004 0.01 0.01 File.join
1.93 16.66 0.37 50004 0.01 0.01 FileTest.size
1.87 17.02 0.36 50005 0.01 0.01 File.lstat
1.76 17.36 0.34 50005 0.01 0.01 FileTest.directory?
1.34 17.61 0.26 50004 0.01 0.01 Integer#+
1.30 17.86 0.25 50005 0.00 0.00 File::Stat#directory?
1.29 18.11 0.25 50006 0.00 0.00 String#initialize_copy
1.29 18.35 0.25 50004 0.00 0.00 Array#unshift
1.28 18.60 0.24 50006 0.00 0.00 Array#shift
1.25 18.84 0.24 50004 0.00 0.00 Kernel#untaint
1.25 19.08 0.24 50005 0.00 0.00 Kernel#taint
0.10 19.09 0.02 1 19.53 19.55 Dir.entries
0.02 19.10 0.00 1 4.10 4.10 Array#sort!
0.00 19.10 0.00 2 0.47 1.12 Kernel#require
0.00 19.10 0.00 4 0.02 0.04 Gem.find_unresolved_default_spec
0.00 19.10 0.00 2 0.04 9549.52 Array#each
0.00 19.10 0.00 1 0.05 0.07 MonitorMixin#mon_enter
0.00 19.10 0.00 1 0.04 0.07 MonitorMixin#mon_exit
0.00 19.10 0.00 1 0.04 0.05 Module#module_function
0.00 19.10 0.00 4 0.01 0.01 IO#set_encoding
0.00 19.10 0.00 1 0.02 0.02 Dir.open
0.00 19.10 0.00 1 0.02 0.11 Array#collect!
0.00 19.10 0.00 1 0.02 0.02 MonitorMixin#mon_check_owner
0.00 19.10 0.00 2 0.01 0.01 Module#method_added
0.00 19.10 0.00 3 0.00 0.00 Thread.current
0.00 19.10 0.00 2 0.01 0.01 String#encoding
0.00 19.10 0.00 2 0.01 0.01 BasicObject#singleton_method_added
0.00 19.10 0.00 2 0.00 0.00 Kernel#respond_to?
0.00 19.10 0.00 1 0.01 0.01 TracePoint#enable
0.00 19.10 0.00 1 0.01 0.01 Gem::Specification.unresolved_deps
0.00 19.10 0.00 1 0.01 0.01 File.exist?
0.00 19.10 0.00 1 0.01 0.01 File.basename
0.00 19.10 0.00 1 0.01 0.01 Thread::Mutex#lock
0.00 19.10 0.00 1 0.01 0.01 String#[]
0.00 19.10 0.00 1 0.01 0.01 Gem.suffixes
0.00 19.10 0.00 1 0.01 0.01 Thread::Mutex#unlock
0.00 19.10 0.00 1 0.01 0.01 Encoding.find
0.00 19.10 0.00 1 0.01 0.01 BasicObject#==
0.00 19.10 0.00 1 0.00 0.00 TracePoint#disable
0.00 19.10 0.00 1 0.00 0.00 Kernel#block_given?
0.00 19.10 0.00 1 0.00 19100.95 #toplevel
After the patch
% cumulative self self total
time seconds seconds calls ms/call ms/call name
45.15 7.70 7.70 100012 0.08 0.52 Find.find
15.12 10.27 2.58 50005 0.05 0.07 nil#
5.76 11.25 0.98 50005 0.02 0.31 Kernel#catch
5.66 12.22 0.96 50006 0.02 0.04 Kernel#dup
5.59 13.17 0.95 50006 0.02 0.02 Kernel#initialize_dup
4.30 13.91 0.73 1 733.77 3952.79 Array#reverse_each
2.12 14.27 0.36 50005 0.01 0.01 File.lstat
2.08 14.62 0.35 50004 0.01 0.01 FileTest.size
2.06 14.97 0.35 50004 0.01 0.01 File.join
1.93 15.30 0.33 50005 0.01 0.01 FileTest.directory?
1.47 15.55 0.25 50005 0.00 0.00 File::Stat#directory?
1.46 15.80 0.25 50006 0.00 0.00 String#initialize_copy
1.46 16.05 0.25 50004 0.00 0.00 Integer#+
1.44 16.30 0.25 50004 0.00 0.00 Array#unshift
1.44 16.54 0.24 50006 0.00 0.00 Array#shift
1.41 16.78 0.24 50004 0.00 0.00 Kernel#untaint
1.40 17.02 0.24 50005 0.00 0.00 Kernel#taint
0.11 17.04 0.02 1 19.16 19.18 Dir.children
0.02 17.04 0.00 1 4.14 4.14 Array#sort!
0.00 17.04 0.00 1 0.61 0.69 Kernel#require_relative
0.00 17.04 0.00 1 0.04 0.05 Module#module_function
0.00 17.04 0.00 4 0.01 0.01 IO#set_encoding
0.00 17.04 0.00 1 0.02 17043.77 Array#each
0.00 17.04 0.00 1 0.02 0.11 Array#collect!
0.00 17.04 0.00 1 0.02 0.02 Dir.open
0.00 17.04 0.00 2 0.01 0.01 Module#method_added
0.00 17.04 0.00 1 0.01 0.01 TracePoint#enable
0.00 17.04 0.00 2 0.00 0.00 String#encoding
0.00 17.04 0.00 2 0.00 0.00 BasicObject#singleton_method_added
0.00 17.04 0.00 1 0.01 0.01 File.basename
0.00 17.04 0.00 1 0.01 0.01 File.exist?
0.00 17.04 0.00 1 0.01 0.01 String#[]
0.00 17.04 0.00 1 0.01 0.01 Encoding.find
0.00 17.04 0.00 1 0.01 0.01 String#==
0.00 17.04 0.00 1 0.01 0.01 BasicObject#==
0.00 17.04 0.00 1 0.00 0.00 TracePoint#disable
0.00 17.04 0.00 1 0.00 0.00 Kernel#block_given?
0.00 17.04 0.00 1 0.00 0.00 Kernel#respond_to?
0.00 17.05 0.00 1 0.00 17045.11 #toplevel
Updated by esparta (Espartaco Palma) about 7 years ago
- Tracker changed from Bug to Misc
- Backport deleted (
2.2: UNKNOWN, 2.3: UNKNOWN, 2.4: UNKNOWN)
Updated by naruse (Yui NARUSE) about 7 years ago
- Tracker changed from Misc to Feature
Updated by naruse (Yui NARUSE) about 7 years ago
- Status changed from Open to Closed
Applied in changeset trunk|r59926.
Find.find -> Use Dir.children instead of Dir.entries
Dir.children is available since Feature #11302.
Find.find can use of the new list (having no '.' neither '..' entries),
making now superflous an if statement.
This change can improve the performance of Find.find when the path
has lots of entries (thousands?).
https://bugs.ruby-lang.org/issues/11302
patched by Espartaco Palma esparta@gmail.com
https://github.com/ruby/ruby/pull/1697 fix GH-1697
[Feature #13896]
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