RDoc::Parser::C: Integrate do_classes and do_modules by one regexp match #731
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The full scan of the C source code (`@content.scan`) is very slow.
The old code invokes the scan six times in `do_classes` and
`do_modules`.
This change integrates the six scans into one by merging the regexps.
The integrated regexp is a bit hard to maintain, but the speed up is
significant: approx. 30 sec -> 20 sec in Ruby's `make rdoc`.
In addition, this change omits `do_boot_defclass` unless the file name
is `class.c`. `boot_defclass` is too specific to Ruby's source code, so
RDoc should handle it as a special case.
Before this change:
TOTAL (pct) SAMPLES (pct) FRAME
858 (13.6%) 858 (13.6%) (garbage collection)
292 (4.6%) 264 (4.2%) RDoc::Parser::C#do_define_class
263 (4.2%) 250 (3.9%) RDoc::Parser::C#do_define_module
275 (4.3%) 241 (3.8%) RDoc::Parser::C#do_define_class_under
248 (3.9%) 237 (3.7%) RDoc::Parser::C#do_define_module_under
234 (3.7%) 234 (3.7%) RDoc::Parser::C#gen_body_table
219 (3.5%) 219 (3.5%) Ripper::Lexer#state_obj
217 (3.4%) 216 (3.4%) RDoc::Parser::C#do_struct_define_without_accessor
205 (3.2%) 205 (3.2%) RDoc::Parser::C#do_boot_defclass
205 (3.2%) 205 (3.2%) RDoc::Parser::C#do_singleton_class
The six methods take approx. 22.2%.
`do_define_class` (4.2%) + `do_define_class_under` (3.8%) +
`do_define_module` (3,9$) + `do_define_module_under` (3.7%) +
`do_struct_define_without_accessor` (3.4%) + `do_singleton_class` (3.2%)
After this change, the methods are integrated to `do_classes_and_modules`
which takes only 5.8%.
TOTAL (pct) SAMPLES (pct) FRAME
812 (16.7%) 812 (16.7%) (garbage collection)
355 (7.3%) 284 (5.8%) RDoc::Parser::C#do_classes_and_modules
225 (4.6%) 225 (4.6%) RDoc::Parser::C#gen_body_table
429 (8.8%) 210 (4.3%) RDoc::Parser::RubyTools#get_tk
208 (4.3%) 208 (4.3%) RDoc::TokenStream#add_tokens
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The full scan of the C source code (
@content.scan) is very slow.The old code invokes the scan six times in
do_classesanddo_modules.This change integrates the six scans into one by merging the regexps.
The integrated regexp is a bit hard to maintain, but the speed up is
significant: approx. 30 sec -> 20 sec in Ruby's
make rdoc.In addition, this change omits
do_boot_defclassunless the file nameis
class.c.boot_defclassis too specific to Ruby's source code, soRDoc should handle it as a special case.