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weppos/if_vs_exception_vs_regexp.rb

Created January 12, 2010 23:48
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if_vs_exception_vs_regexp.rb
require 'ipaddr'
require 'benchmark'
class IPAddr
def self.valid_ipv4?(addr)
if /\A(\d{1,3})\.(\d{1,3})\.(\d{1,3})\.(\d{1,3})\Z/ =~ addr
return $~.captures.all? {|i| i.to_i < 256}
end
false
end
def self.valid_ipv6?(addr)
# IPv6 (normal)
return true if /\A[\dA-Fa-f]{1,4}(:[\dA-Fa-f]{1,4})*\Z/ =~ addr
return true if /\A[\dA-Fa-f]{1,4}(:[\dA-Fa-f]{1,4})*::([\dA-Fa-f]{1,4}(:[\dA-Fa-f]{1,4})*)?\Z/ =~ addr
return true if /\A::([\dA-Fa-f]{1,4}(:[\dA-Fa-f]{1,4})*)?\Z/ =~ addr
# IPv6 (IPv4 compat)
return true if /\A[\dA-Fa-f]{1,4}(:[\dA-Fa-f]{1,4})*:/ =~ addr && valid_ipv4?($')
return true if /\A[\dA-Fa-f]{1,4}(:[\dA-Fa-f]{1,4})*::([\dA-Fa-f]{1,4}(:[\dA-Fa-f]{1,4})*:)?/ =~ addr && valid_ipv4?($')
return true if /\A::([\dA-Fa-f]{1,4}(:[\dA-Fa-f]{1,4})*:)?/ =~ addr && valid_ipv4?($')
false
end
end
class Bim
attr_accessor :cls, :data
def initialize(cls, data)
self.cls = cls
self.data = data
end
def value
IPAddr.new(data).to_i
rescue ArgumentError
data
end
end
class Bum
attr_accessor :cls, :data
def initialize(cls, data)
self.cls = cls
self.data = data
end
def value
if cls == "A"
IPAddr.new(data).to_i
else
data
end
end
end
class Bam
attr_accessor :cls, :data
def initialize(cls, data)
self.cls = cls
self.data = data
end
def value
if IPAddr.valid_ipv4?(data) || IPAddr.valid_ipv6?(data)
IPAddr.new(data).to_i
else
data
end
end
end
TIMES = 50_000
Benchmark.bmbm do |x|
x.report("NS exception") do
TIMES.times { b = Bim.new("NS", "ns2.foo.com"); b.value }
end
x.report("NS if") do
TIMES.times { b = Bum.new("NS", "ns2.foo.com"); b.value }
end
x.report("NS regexp") do
TIMES.times { b = Bam.new("NS", "ns2.foo.com"); b.value }
end
x.report("A exception") do
TIMES.times { b = Bim.new("A", "192.168.1.1"); b.value }
end
x.report("A if") do
TIMES.times { b = Bum.new("A", "192.168.1.1"); b.value }
end
x.report("A regepx") do
TIMES.times { b = Bum.new("A", "192.168.1.1"); b.value }
end
end
__END__
# ruby 1.8.7 (2009-12-24 patchlevel 248) [i686-darwin10.2.0]
$ ruby if_vs_exception.rb
Rehearsal ------------------------------------------------
NS exception 4.330000 5.750000 10.080000 ( 37.599575)
NS if 0.140000 0.010000 0.150000 ( 0.136280)
NS regexp 0.450000 0.000000 0.450000 ( 0.454040)
A exception 2.010000 0.020000 2.030000 ( 2.047711)
A if 2.060000 0.020000 2.080000 ( 2.074642)
A regepx 2.030000 0.020000 2.050000 ( 2.054930)
-------------------------------------- total: 16.840000sec
user system total real
NS exception 4.420000 5.810000 10.230000 ( 38.350608)
NS if 0.130000 0.000000 0.130000 ( 0.130863)
NS regexp 0.450000 0.000000 0.450000 ( 0.447975)
A exception 2.000000 0.020000 2.020000 ( 2.016231)
A if 2.020000 0.020000 2.040000 ( 2.043085)
A regepx 2.030000 0.020000 2.050000 ( 2.048402)
# ruby 1.9.1p376 (2009-12-07 revision 26041) [i386-darwin10.2.0]
Rehearsal ------------------------------------------------
NS exception 4.650000 5.800000 10.450000 ( 39.134858)
NS if 0.080000 0.000000 0.080000 ( 0.079427)
NS regexp 0.320000 0.000000 0.320000 ( 0.320389)
A exception 1.180000 0.010000 1.190000 ( 1.182892)
A if 1.200000 0.000000 1.200000 ( 1.209433)
A regepx 1.220000 0.000000 1.220000 ( 1.219345)
-------------------------------------- total: 14.460000sec
user system total real
NS exception 4.520000 5.720000 10.240000 ( 37.931455)
NS if 0.080000 0.000000 0.080000 ( 0.078286)
NS regexp 0.320000 0.000000 0.320000 ( 0.320988)
A exception 1.190000 0.000000 1.190000 ( 1.186198)
A if 1.210000 0.010000 1.220000 ( 1.220254)
A regepx 1.220000 0.000000 1.220000 ( 1.215634)
Raw
if_vs_exception_vs_regexp_zerodivision.rb
require 'ipaddr'
require 'benchmark'
class IPAddr
def self.valid_ipv4?(addr)
if /\A(\d{1,3})\.(\d{1,3})\.(\d{1,3})\.(\d{1,3})\Z/ =~ addr
return $~.captures.all? {|i| i.to_i < 256}
end
false
end
def self.valid_ipv6?(addr)
# IPv6 (normal)
return true if /\A[\dA-Fa-f]{1,4}(:[\dA-Fa-f]{1,4})*\Z/ =~ addr
return true if /\A[\dA-Fa-f]{1,4}(:[\dA-Fa-f]{1,4})*::([\dA-Fa-f]{1,4}(:[\dA-Fa-f]{1,4})*)?\Z/ =~ addr
return true if /\A::([\dA-Fa-f]{1,4}(:[\dA-Fa-f]{1,4})*)?\Z/ =~ addr
# IPv6 (IPv4 compat)
return true if /\A[\dA-Fa-f]{1,4}(:[\dA-Fa-f]{1,4})*:/ =~ addr && valid_ipv4?($')
return true if /\A[\dA-Fa-f]{1,4}(:[\dA-Fa-f]{1,4})*::([\dA-Fa-f]{1,4}(:[\dA-Fa-f]{1,4})*:)?/ =~ addr && valid_ipv4?($')
return true if /\A::([\dA-Fa-f]{1,4}(:[\dA-Fa-f]{1,4})*:)?/ =~ addr && valid_ipv4?($')
false
end
end
class Bim
attr_accessor :cls, :data
def initialize(cls, data)
self.cls = cls
self.data = data
end
def value
1 / 0
rescue ZeroDivisionError
1
end
end
class Bum
attr_accessor :cls, :data
def initialize(cls, data)
self.cls = cls
self.data = data
end
def value
if cls == "A"
0
else
1
end
end
end
class Bam
attr_accessor :cls, :data
def initialize(cls, data)
self.cls = cls
self.data = data
end
def value
if IPAddr.valid_ipv4?(data) || IPAddr.valid_ipv6?(data)
0
else
1
end
end
end
TIMES = 50_000
Benchmark.bmbm do |x|
x.report("NS exception") do
TIMES.times { b = Bim.new("NS", "ns2.foo.com"); b.value }
end
x.report("NS if") do
TIMES.times { b = Bum.new("NS", "ns2.foo.com"); b.value }
end
x.report("NS regexp") do
TIMES.times { b = Bam.new("NS", "ns2.foo.com"); b.value }
end
x.report("A exception") do
TIMES.times { b = Bim.new("A", "192.168.1.1"); b.value }
end
x.report("A if") do
TIMES.times { b = Bum.new("A", "192.168.1.1"); b.value }
end
x.report("A regepx") do
TIMES.times { b = Bum.new("A", "192.168.1.1"); b.value }
end
end
__END__
$ ruby /Users/carletti/Desktop/bench.rb
Rehearsal ------------------------------------------------
NS exception 0.690000 0.050000 0.740000 ( 0.740209)
NS if 0.100000 0.000000 0.100000 ( 0.100608)
NS regexp 0.380000 0.000000 0.380000 ( 0.379736)
A exception 0.690000 0.040000 0.730000 ( 0.735069)
A if 0.100000 0.000000 0.100000 ( 0.099597)
A regepx 0.100000 0.000000 0.100000 ( 0.104152)
--------------------------------------- total: 2.150000sec
user system total real
NS exception 0.690000 0.050000 0.740000 ( 0.746834)
NS if 0.100000 0.000000 0.100000 ( 0.099066)
NS regexp 0.370000 0.000000 0.370000 ( 0.380592)
A exception 0.690000 0.050000 0.740000 ( 0.741232)
A if 0.100000 0.000000 0.100000 ( 0.100776)
A regepx 0.100000 0.000000 0.100000 ( 0.101338)
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