<_index>8.9.10 A very<_i> good<_b> section<_h2>Hi.<_p><_body>"
#"(<[^>]*>)*[0-9.]+(.*)<_h[2-9]>" 100000 '())
+ (list 'dna dna-str #"agggtaa[cgt]|[acg]ttaccct" 100000 '())
+ (list 'dna dna-str #"[aA][gG][gG][gG][tT][aA][aA][cCgGtT]|[aAcCgG][tT][tT][aA][cC][cC][cC][tT]" 100000 '())
+ (list 'dna dna-str #"(?i:agggtaa[cgt]|[acg]ttaccct)" 100000 '(rxmzold))
+ (list 'dna dna-up-str #"(?i:agggtaa[cgt]|[acg]ttaccct)" 100000 '(rxmzold))
(list 'far (bytes-append (make-bytes 10000 (char->integer #\a)) #"z") #"z" 10000 '())
- (list 'farzq (bytes-append (make-bytes 1000 (char->integer #\a)) #"z") #"[zq]" 10000 '())
+ (list 'farzq (bytes-append (make-bytes 1000 (char->integer #\a)) #"z") #"[zq]" 100000 '())
(list 'farzqalt (bytes-append (make-bytes 1000 (char->integer #\a)) #"z") #"z|q" 100000 '(perl))
- (list 'fard (bytes-append (make-bytes 1000 (char->integer #\a)) #"0") #"\\d" 10000 '())
- (list 'farw (bytes-append (make-bytes 1000 (char->integer #\space)) #"_") #"\\w" 10000 '())
+ (list 'fard (bytes-append (make-bytes 1000 (char->integer #\a)) #"0") #"\\d" 100000 '())
+ (list 'farw (bytes-append (make-bytes 1000 (char->integer #\space)) #"_") #"\\w" 100000 '())
(list 'farnz (bytes-append (make-bytes 10000 (char->integer #\a)) #"z") #"(?:)z" 1000 '())
+ (list 'farbol (bytes-append (make-bytes 100 (char->integer #\x)) #"\na") #"(?m:^a)" 100000 '(rxmzold))
+ (list 'farlook (bytes-append (make-bytes 100 (char->integer #\x)) #"a") #"(?=a)a" 100000 '(rxmzold))
+ (list 'farlooknot (bytes-append (make-bytes 100 (char->integer #\x)) #"a") #"(?!b)a" 100000 '(rxmzold))
+ (list 'farlookb (bytes-append (make-bytes 100 (char->integer #\x)) #"a") #"(?<=x)a" 100000 '(rxmzold))
+ (list 'farlookbnot (bytes-append (make-bytes 100 (char->integer #\x)) #"a") #"(?integer #\x)) #"a") #"()a" 100000 '())
+ (list 'farsub (bytes-append (make-bytes 100 (char->integer #\x)) #"a") #"(a)" 100000 '())
+ (list 'faraa (bytes-append (make-bytes 100 (char->integer #\x)) #"aa") #"(aa)" 100000 '())
+ (list 'farcut (bytes-append (make-bytes 100 (char->integer #\x)) #"ab") #"(?>a)b" 100000 '(rxmzold python))
+ (list 'fareol (bytes-append (make-bytes 100 (char->integer #\x)) #"\n") #"(?m:$[^x])" 100000 '(rxmzold))
+ (list 'past (bytes-append (make-bytes 10000 (char->integer #\a)) #"z") #"a*z" 10000 '())
+ (list 'pastab (bytes-append (make-bytes 1000 (char->integer #\a)) #"z") #"[ab]*z" 100000 '())
+ (list 'pastabalt (bytes-append (make-bytes 1000 (char->integer #\a)) #"z") #"(?:a|b)*z" 100000 '(perl))
+ (list 'pastd (bytes-append (make-bytes 1000 (char->integer #\0)) #"z") #"\\d*z" 100000 '())
+ (list 'pastw (bytes-append (make-bytes 1000 (char->integer #\_)) #":") #"\\w*:" 100000 '())
+ (list 'pastna (bytes-append (make-bytes 10000 (char->integer #\a)) #"z") #"(?:(?:)a)*z" 1000 '(python))
(list 'backtrack (bytes-append (make-bytes 300 (char->integer #\a)) #"zay") #"a*y" 1000 '())
(list 'backtrack (bytes-append (make-bytes 300 (char->integer #\a)) #"zay") #"a*?z" 10000 '())
(list 'backtrack (bytes-append (make-bytes 300 (char->integer #\a)) #"zay") #"a*?y" 1000 '())
(list 'alts #"cataract23" #"(cat(a(ract|tonic)|erpillar))2(3)" 100000 '())
(list 'alts #"cataract23" #"(?:cat(?:a(?:ract|tonic)|erpillar))23" 100000 '())
(list 'alts #"caterpillar23" #"(?:cat(?:a(?:ract|tonic)|erpillar))23" 100000 '())
- (list 'alts #"cataract23" #"(?i:(?:cat(?:a(?:ract|tonic)|erpillar)))23" 100000 '(mzold))
- (list 'backref #"cataract cataract23" #"(cat(a(ract|tonic)|erpillar)) \\1()2(3)" 100000 '(mzold))
- (list 'backref #"cataract cataract23" #"(cat(?:a(?:ract|tonic)|erpillar)) \\1(?:)23" 100000 '(mzold))
- (list 'backref #"caterpillar caterpillar23" #"(cat(?:a(?:ract|tonic)|erpillar)) \\1(?:)23" 100000 '(mzold))
- (list 'backref #"cataract cataract23" #"(?i:(cat(?:a(?:ract|tonic)|erpillar))) \\1(?:)23" 100000 '(mzold))
- (list 'digits #"From abcd Mon Sep 1 12:33:02 1997" #"^From\\s+\\S+\\s+([a-zA-Z]{3}\\s+){2}\\d{1,2}\\s+\\d\\d:\\d\\d" 100000 '(mzold))
- (list 'digits #"From abcd Sep 01 12:33:02 1997" #"^From\\s+\\S+\\s+([a-zA-Z]{3}\\s+){2}\\d{1,2}\\s+\\d\\d:\\d\\d" 100000 '(mzold))
- (list 'lines (bytes-append (make-bytes 100 (char->integer #\x)) #"\na\nb\nc\nxxxxxxxx") #"(?m:^a(?:$)[^a]^b(?:$)[^a]^c(?:$))" 100000 '(mzold))
- (list 'lookahead #"foobar is foolish see?" #"foo(?!bar).*" 100000 '(mzold))
- (list 'lookahead #"foobar crowbar etc" #"(?:(?!foo)...|^.{0,2})bar.*" 100000 '(mzold))
- (list 'lookbehind #"foobar is foolish see?" #"(?<=foo)lish.*" 100000 '(mzold))
- (list 'lookbehind #"foobar crowbar etc" #"(?<=bar ....)bar.*" 100000 '(mzold))
- (list 'cond (bytes-append #"E" (make-bytes 100 (char->integer #\x))) #"^(E)?(?(1)xx|x)*$" 10000 '(python mzold))
- (list 'cond (bytes-append #"E" (make-bytes 101 (char->integer #\x))) #"^(E)?(?(1)xx|x)*$" 10000 '(python mzold))
- (list 'cond (make-bytes 101 (char->integer #\x)) #"^(E)?(?(1)xx|x)*$" 10000 '(python mzold))
- (list 'cut #"now is the time for all good men to come to the aid of the party" #"^((?>\\w+)|(?>\\s+))*$" 30000 '(python mzold))
- (list 'cut #"this is not a line with only words and spaces!" #"^((?>\\w+)|(?>\\s+))*$" 30000 '(python mzold))
+ (list 'alts #"cataract23" #"(?i:(?:cat(?:a(?:ract|tonic)|erpillar)))23" 100000 '(rxmzold))
+ (list 'backref #"cataract cataract23" #"(cat(a(ract|tonic)|erpillar)) \\1()2(3)" 100000 '(rxmzold))
+ (list 'backref #"cataract cataract23" #"(cat(?:a(?:ract|tonic)|erpillar)) \\1(?:)23" 100000 '(rxmzold))
+ (list 'backref #"caterpillar caterpillar23" #"(cat(?:a(?:ract|tonic)|erpillar)) \\1(?:)23" 100000 '(rxmzold))
+ (list 'backref #"cataract cataract23" #"(?i:(cat(?:a(?:ract|tonic)|erpillar))) \\1(?:)23" 100000 '(rxmzold))
+ (list 'digits #"From abcd Mon Sep 1 12:33:02 1997"
+ #"^From\\s+\\S+\\s+([a-zA-Z]{3}\\s+){2}\\d{1,2}\\s+\\d\\d:\\d\\d" 100000 '(rxmzold))
+ (list 'digits #"From abcd Sep 01 12:33:02 1997"
+ #"^From\\s+\\S+\\s+([a-zA-Z]{3}\\s+){2}\\d{1,2}\\s+\\d\\d:\\d\\d" 100000 '(rxmzold))
+ (list 'lines (bytes-append (make-bytes 100 (char->integer #\x)) #"\na\nb\nc\nxxxxxxxx")
+ #"(?m:^a(?:$)[^a]^b(?:$)[^a]^c(?:$))" 100000 '(rxmzold))
+ (list 'lines (bytes-append (make-bytes 100 (char->integer #\newline)) #"\na\nb\nc\nxxxxxxxx")
+ #"(?m:^a(?:$)[^a]^b(?:$)[^a]^c(?:$))" 100000 '(rxmzold))
+ (list 'lookahead #"foobar is foolish see?" #"foo(?!bar).*" 100000 '(rxmzold))
+ (list 'lookahead #"foobar crowbar etc" #"(?:(?!foo)...|^.{0,2})bar.*" 100000 '(rxmzold))
+ (list 'lookbehind #"foobar is foolish see?" #"(?<=foo)lish.*" 100000 '(rxmzold))
+ (list 'lookbehind #"foobar crowbar etc" #"(?<=bar ....)bar.*" 100000 '(rxmzold))
+ (list 'cond (bytes-append #"E" (make-bytes 100 (char->integer #\x))) #"^(E)?(?(1)xx|x)*$" 10000 '(python rxmzold))
+ (list 'cond (bytes-append #"E" (make-bytes 101 (char->integer #\x))) #"^(E)?(?(1)xx|x)*$" 10000 '(python rxmzold))
+ (list 'cond (make-bytes 101 (char->integer #\x)) #"^(E)?(?(1)xx|x)*$" 10000 '(python rxmzold))
+ (list 'cut #"now is the time for all good men to come to the aid of the party"
+ #"^((?>\\w+)|(?>\\s+))*$" 30000 '(python rxmzold))
+ (list 'cut #"this is not a line with only words and spaces!" #"^((?>\\w+)|(?>\\s+))*$" 30000 '(python rxmzold))
(list 'escape #"yesBABthe AAABquickAAAB brown foxABB" #"yesB([^AB]+|A.)*B" 10000 '())
(list 'escape #"noBABthe AAABquickAAAB brown foxAB" #"noB([^AB]+|A.)*B" 10 '())
(list 'escape #"yesBABthe AAABquickAAAB brown foxABB" #"yesB(?:[^AB]+|A.)*B" 10000 '())
(list 'escape #"noBABthe AAABquickAAAB brown foxAB" #"noB(?:[^AB]+|A.)*B" 10 '())
- (list 'escape #"yesbabthe aaabquickaaab frown foxabb" #"(?i:yesB(?:[^AB]+|A.)*B)" 100000 '(mzold))
- (list 'escape #"nobabthe aaabquickaaab frown foxab" #"(?i:noB(?:[^AB]+|A.)*B)" 10 '(mzold))
- (list 'stress-same (make-bytes 1000 (char->integer #\x)) #"^(x|a)\\1*x$" 1000 '(mzold))
- (list 'stress-same (make-bytes 1000 (char->integer #\x)) #"^(x*|a)\\1x$" 1000 '(mzold))
- (list 'stress-same (make-bytes 1000 (char->integer #\x)) #"^(x*?|a)\\1x$" 1000 '(mzold))
- (list 'stress-same (make-bytes 1000 (char->integer #\x)) #"^(x*|a)\\1x" 10000 '(mzold))
- (list 'stress-same (make-bytes 1000 (char->integer #\x)) #"^(x{499})\\1x" 10000 '(mzold))
+ (list 'escape #"yesbabthe aaabquickaaab frown foxabb" #"(?i:yesB(?:[^AB]+|A.)*B)" 100000 '(rxmzold))
+ (list 'escape #"nobabthe aaabquickaaab frown foxab" #"(?i:noB(?:[^AB]+|A.)*B)" 10 '(rxmzold))
+ (list 'stress-same (make-bytes 1000 (char->integer #\x)) #"^(x|a)\\1*x$" 1000 '(rxmzold))
+ (list 'stress-same (make-bytes 1000 (char->integer #\x)) #"^(x*|a)\\1x$" 1000 '(rxmzold))
+ (list 'stress-same (make-bytes 1000 (char->integer #\x)) #"^(x*?|a)\\1x$" 1000 '(rxmzold))
+ (list 'stress-same (make-bytes 1000 (char->integer #\x)) #"^(x*|a)\\1x" 10000 '(rxmzold))
+ (list 'stress-same (make-bytes 1000 (char->integer #\x)) #"^(x{499})\\1x" 10000 '(rxmzold))
(list 'stress-any (make-bytes 1000 (char->integer #\x)) #"(?s:.*)" 100000 '())
- (list 'stress-any (make-bytes 10000 (char->integer #\x)) #"(?s:.*)" 100000 '(mzunicode mzunicode-j))
- (list 'stress-any (make-bytes 100000 (char->integer #\x)) #"(?s:.*)" 100000 '(mzunicode mzunicode-j))
- (list 'stress-nonlf (make-bytes 100 (char->integer #\x)) #"(?m:.*)" 100000 '(mzold))
- (list 'stress-nonlf (make-bytes 1000 (char->integer #\x)) #"(?m:.*)" 100000 '(mzunicode mzunicode-j mzold))
- (list 'stress-nonlf (make-bytes 10000 (char->integer #\x)) #"(?m:.*)" 100000 '(mzunicode mzunicode-j mzold))
- (list 'stress-nonlf (make-bytes 100000 (char->integer #\x)) #"(?m:.*)" 10000 '(mzunicode mzunicode-j mzold))
+ (list 'stress-any (make-bytes 10000 (char->integer #\x)) #"(?s:.*)" 100000 '(mzunicode))
+ (list 'stress-any (make-bytes 100000 (char->integer #\x)) #"(?s:.*)" 100000 '(mzunicode))
+ (list 'stress-nonlf (make-bytes 100 (char->integer #\x)) #"(?m:.*)" 100000 '(rxmzold))
+ (list 'stress-nonlf (make-bytes 1000 (char->integer #\x)) #"(?m:.*)" 100000 '(mzunicode rxmzold))
+ (list 'stress-nonlf (make-bytes 10000 (char->integer #\x)) #"(?m:.*)" 100000 '(mzunicode rxmzold))
+ (list 'stress-nonlf (make-bytes 100000 (char->integer #\x)) #"(?m:.*)" 10000 '(mzunicode rxmzold))
(list 'stress-anysave (make-bytes 100 (char->integer #\x)) #"(?s:(.)*)" 100000 '())
- (list 'stress-anysave (make-bytes 1000 (char->integer #\x)) #"(?s:(.)*)" 100000 '(pcre python mzunicode mzunicode-j mzold))
- (list 'stress-anysave (make-bytes 10000 (char->integer #\x)) #"(?s:(.)*)" 100000 '(pcre python mzunicode mzunicode-j mzold))
- (list 'stress-anysave (make-bytes 100000 (char->integer #\x)) #"(?s:(.)*)" 100000 '(pcre python mzunicode mzunicode-j mzold))
+ (list 'stress-anysave (make-bytes 1000 (char->integer #\x)) #"(?s:(.)*)" 100000
+ '(pcre python mzunicode rxmzold))
+ (list 'stress-anysave (make-bytes 10000 (char->integer #\x)) #"(?s:(.)*)" 100000
+ '(pcre python mzunicode rxmzold))
+ (list 'stress-anysave (make-bytes 100000 (char->integer #\x)) #"(?s:(.)*)" 100000
+ '(pcre python mzunicode rxmzold))
(list 'stress-xs (make-bytes 100 (char->integer #\x)) #"x*" 100000 '())
(list 'stress-xs (make-bytes 1000 (char->integer #\x)) #"x*" 100000 '())
(list 'stress-xs (make-bytes 10000 (char->integer #\x)) #"x*" 10000 '())
@@ -209,12 +233,12 @@ exec mzscheme -qu "$0" ${1+"$@"}
(list 'stress-yzorx (make-bytes 10000 (char->integer #\x)) #"(?:[yz]|x)*" 100 '(python))
(list 'stress-yzorx (make-bytes 100000 (char->integer #\x)) #"(?:[yz]|x)*" 10 '(pcre python))
(list 'stress-yzorxsave (make-bytes 100 (char->integer #\x)) #"([yz]|x)*" 10000 '())
- (list 'stress-x2 (make-bytes 100 (char->integer #\x)) #"(?:x{2})*" 10000 '(mzold))
- (list 'stress-x2 (make-bytes 1000 (char->integer #\x)) #"(?:x{2})*" 10000 '(python mzold))
- (list 'stress-x2 (make-bytes 10000 (char->integer #\x)) #"(?:x{2})*" 100 '(python mzold))
- (list 'stress-x2 (make-bytes 100000 (char->integer #\x)) #"(?:x{2})*" 100 '(pcre python mzold))
- (list 'stress-x2saveall (make-bytes 100 (char->integer #\x)) #"(x{2})*" 10000 '(mzold))
- (list 'stress-x2save (make-bytes 100 (char->integer #\x)) #"((x){2})*" 10000 '(mzold))
+ (list 'stress-x2 (make-bytes 100 (char->integer #\x)) #"(?:x{2})*" 10000 '(rxmzold))
+ (list 'stress-x2 (make-bytes 1000 (char->integer #\x)) #"(?:x{2})*" 10000 '(python rxmzold))
+ (list 'stress-x2 (make-bytes 10000 (char->integer #\x)) #"(?:x{2})*" 100 '(python rxmzold))
+ (list 'stress-x2 (make-bytes 100000 (char->integer #\x)) #"(?:x{2})*" 100 '(pcre python rxmzold))
+ (list 'stress-x2saveall (make-bytes 100 (char->integer #\x)) #"(x{2})*" 10000 '(rxmzold))
+ (list 'stress-x2save (make-bytes 100 (char->integer #\x)) #"((x){2})*" 10000 '(rxmzold))
(list 'stress-foobarbaz (bytes-append (random-letters 100) #"FOOBARBAZ") #"[a-z]*FOOBARBAZ" 100000 '())
(list 'stress-foobarbaz (bytes-append (random-letters 1000) #"FOOBARBAZ") #"[a-z]*FOOBARBAZ" 10000 '())
(list 'stress-foobarbaz (bytes-append (random-letters 10000) #"FOOBARBAZ") #"[a-z]*FOOBARBAZ" 1000 '())
@@ -225,13 +249,19 @@ exec mzscheme -qu "$0" ${1+"$@"}
(list 'stress-nopesave (bytes-append (random-letters 100) #"FOOBARBAZ") #"([a-z])*FOOBARNOPE" 1000000 '(python))
(list 'stress-altfoobarbaz (bytes-append (random-letters 100) #"FOOBARBAZ") #"(?:[a-z]|ab)*FOOBARBAZ" 10000 '())
(list 'stress-altfoobarbaz (bytes-append (random-letters 1000) #"FOOBARBAZ") #"(?:[a-z]|ab)*FOOBARBAZ" 1000 '())
- (list 'stress-altfoobarbaz (bytes-append (random-letters 10000) #"FOOBARBAZ") #"(?:[a-z]|ab)*FOOBARBAZ" 10 '(python))
- (list 'stress-altnope (bytes-append (random-letters 100) #"FOOBARBAZ") #"(?:[a-z]|ab)*FOOBARNOPE" 1000000 '(python))
- (list 'stress-altnope (bytes-append (random-letters 1000) #"FOOBARBAZ") #"(?:[a-z]|ab)*FOOBARNOPE" 100000 '(pcre python))
- (list 'stress-altnope (bytes-append (random-letters 10000) #"FOOBARBAZ") #"(?:[a-z]|ab)*FOOBARNOPE" 10000 '(pcre python))
- (list 'stress-nopeci (bytes-append (random-letters 100) #"FOOBARBAZ") #"(?i:[a-z]*FOOBARNOPE)" 10000 '(mzold))
- (list 'stress-nopeci (bytes-append (random-letters 1000) #"FOOBARBAZ") #"(?i:[a-z]*FOOBARNOPE)" 1000 '(pcre perl python mzold))
- (list 'stress-nopeci (bytes-append (random-letters 10000) #"FOOBARBAZ") #"(?i:[a-z]*FOOBARNOPE)" 1000 '(pcre perl python mzold)))))
+ (list 'stress-altfoobarbaz (bytes-append (random-letters 10000) #"FOOBARBAZ") #"(?:[a-z]|ab)*FOOBARBAZ" 10
+ '(python))
+ (list 'stress-altnope (bytes-append (random-letters 100) #"FOOBARBAZ") #"(?:[a-z]|ab)*FOOBARNOPE" 1000000
+ '(python))
+ (list 'stress-altnope (bytes-append (random-letters 1000) #"FOOBARBAZ") #"(?:[a-z]|ab)*FOOBARNOPE" 100000
+ '(pcre python))
+ (list 'stress-altnope (bytes-append (random-letters 10000) #"FOOBARBAZ") #"(?:[a-z]|ab)*FOOBARNOPE" 10000
+ '(pcre python))
+ (list 'stress-nopeci (bytes-append (random-letters 100) #"FOOBARBAZ") #"(?i:[a-z]*FOOBARNOPE)" 10000 '(rxmzold))
+ (list 'stress-nopeci (bytes-append (random-letters 1000) #"FOOBARBAZ") #"(?i:[a-z]*FOOBARNOPE)" 1000
+ '(pcre perl python rxmzold))
+ (list 'stress-nopeci (bytes-append (random-letters 10000) #"FOOBARBAZ") #"(?i:[a-z]*FOOBARNOPE)" 1000
+ '(pcre perl python rxmzold)))))
(define benchmark-names (map car inputs))
@@ -240,15 +270,11 @@ exec mzscheme -qu "$0" ${1+"$@"}
(list 'perl test-perl)
(list 'python test-python)
(list 'pcre test-pcre)
- (list 'mzscheme-j test-mzscheme-j)
(list 'mzunicode test-mzunicode)
- (list 'mzunicode-j test-mzunicode-j)
- (list 'mzold test-mzold)))
+ (list 'rxmzold test-rxmzold)))
- (define non-defaults (list 'mzscheme-j
- 'mzunicode
- 'mzunicode-j
- 'mzold))
+ (define non-defaults (list 'mzunicode
+ 'rxmzold))
;; Extract command-line arguments --------------------
diff --git a/collects/tests/mzscheme/benchmarks/rx/index-template.html b/collects/tests/mzscheme/benchmarks/rx/index-template.html
new file mode 100644
index 0000000000..81ca3730ae
--- /dev/null
+++ b/collects/tests/mzscheme/benchmarks/rx/index-template.html
@@ -0,0 +1,76 @@
+
+Some Scheme Benchmarks
+
+
+About the Benchmarks
+
+The pages linked below show some benchmark results on a collection of
+ regexp benchmarks.
+
+Tables show relative performance, with the actual time for the fastest
+ run shown on the left. So, by default, 1
+ is the fastest, but select any implementation to normalize the table with
+ respect to that implementation's speed. A -- appears when a benchmark
+ didn't run in an implementation (either due to a missing feature, a very long
+ run time, or stack overflow).
+
+Run times are averaged over three runs. All reported times are CPU time (system plus user).
+ The times for MzScheme, Perl, and Python use the language's sime function to record the
+ times before and after a loop within the language; the PCRE times are based on calls
+ a timed MzScheme loop using calling PCRE via (lib "foreign.ss").
+
+A benchmark name name/N/M means that the
+ input size was roughly 10N and roughly
+ 10M iterations were used. The name part
+ can be matched to actual patterns and inputs in the source (see link below).
+
+The stress- benchmarks were taken from the CL-PPCRE
+ benchmark suite. Most others were written to test specific regexp
+ features, although a few were taken from useful code.
+
+Versions and performance notes:
+
+
+- MzScheme: 352.6
+
- Many of the benchmarks serve as a performance test suite for MzScheme,
+ and the MzScheme implementor also produced the benchmarks, so MzScheme
+ should perform reasonably well!
+
+- PCRE: 6.7 (compiled with defaults)
+- PCRE doesn't seem to ignore empty patterns like (?:),
+ which probably don't come up much in practice. Also, the default build
+ mode uses C recursion, so some of the stress tests fail due to
+ stack overflow; recompiling to use heap frames would presumably
+ fix the problem.
+
+- Perl: 5.8.6
+- Perl is especially clever on the even-numbered escape tests (where
+ the even-numbered ones are where the input doesn't match).
+ Perl lags significantly only on the stress-nopeci benchmarks, which
+ require lots of backtracking unless the implementation first
+ checks for the existence of a case-insensitive version of a
+ literal string; MzScheme checks only because the CL-PPCRE benchmark
+ suite suggested the test.
+
+- Python: 2.3.5 (old version!)
+- Conditionals were added to Python's regexp library in version 2.4.
+ The non-backtracking form (?>...)
+ doesn't seem to be supported.
+
+- RxMzOld = Mzscheme 352.5
+- This was the last version of MzScheme with the old regexp system.
+
+
+
+
+For further details on the benchmarks here, see the benchmark source and
+ infrastructure, which is available form the PLT SVN repository:
+
+
+ http://svn.plt-scheme.org/plt/trunk/collects/tests/mzscheme/benchmarks/rx/
+
+Results
+
+
+- machine1 Mac OS X, PowerPC, 1.5GHz, 500MB
+