Kazuma Furuhashi 284km

## StringScanner#scan が思ったより遅いことについて考えていた.md

      
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                / StringScanner#scan が思ったより遅いことについて考えていた.md
            
            
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              December 8, 2018 08:18
            
              
                StringScanner#scan が思ったより遅いことについて考えていた.md
              
          
    # $ ruby strscan_split.rb
# Warming up --------------------------------------
#                split    14.000  i/100ms
#              strscan     4.000  i/100ms
#   strscan without <<     5.000  i/100ms
# strscan w/o << regex     5.000  i/100ms
#    strscan w/o split     4.000  i/100ms
#            strscan.*    32.000  i/100ms


## ccsv_test.md

      
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                / ccsv_test.md
            
            
              Created
              December 8, 2018 07:32
            
              
                ccsv は速いけど単純に ruby/csv と比較できなかった.md
              
          
    result

Run options: 

# Running tests:


 1) Failure:


## gist:56b4e8444e8778ed8132ef663a93f5dc
```
$ rake
Run options:

# Running tests:

Finished tests in 1.893467s, 224.9841 tests/s, 4058.1642 assertions/s.
426 tests, 7684 assertions, 0 failures, 0 errors, 0 skips

ruby -v: ruby 2.5.3p105 (2018-10-18 revision 65156) [x86_64-darwin17]

## apache_arrow_20181010.md

      
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              November 29, 2018 05:16
            
              
                [English translation of selfishly] Apache Arrow 0.11.0 Released (October 10, 2018) by Sutou-san
              
          
    Original article


Apache Arrow 0.11.0リリース - ククログ(2018-10-10)

Apache Arrow 0.11.0 Released (October 10, 2018)

The original Japanese article was written by Kouhei Sutou, a member of Apache Arrow PMC. He was the release manager of Apache Arrow 0.11.0.
We released Apache Arrow 0.11.0 on October 8, 2018.

  
## apache_arrow_20180905.md

      
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                [English translation of selfishly] The latest information on Apache Arrow (September 5, 2018) by Sutou-san
              
          
    Original article


Apache Arrowの最新情報（2018年9月版） - ククログ(2018-09-05)

The latest information on Apache Arrow (September 5, 2018)

Do you know Apache Arrow? Most people probably do not hear or know only the name or only the concept. There will be few people who have actually experienced it. Apache Arrow is a project that will become an important component in the data processing in a few years. People who are interested in the data processing should be useful to know, so I will introduce the latest information as of September 2018.
I'm the only Japanese in PMC and the number of commits is the third most. Maybe I'm familiar with Apache Arrow in Japan.  Since there is not much information on Apache Arrow in Japanese, I will introduce it in Japanese. Incidentally, there are various information in English. Useful information sources include the official blog of Apache Arrow,
[

  
## ips.md

      
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                284km
                / ips.md
            
            
              Created
              May 31, 2018 07:18
            
              
                libcsv/csv ips
              
          
    # 5 columns, 10,000 rows

Warming up --------------------------------------
            unquoted     1.000  i/100ms
              quoted     1.000  i/100ms
   (libcsv) unquoted     1.000  i/100ms
     (libcsv) quoted     1.000  i/100ms
Calculating -------------------------------------


## memory_usage.md

      
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              May 30, 2018 18:39
            
              
                (csv / libcsv) memory usage
              
          
    ### 10 columns, 1,000,000 lines

Calculating -------------------------------------
            unquoted     1.397B memsize (    61.000M retained)
                        16.000M objects (     2.000  retained)
                        28.000  strings (     1.000  retained)
              quoted     1.857B memsize (    81.000M retained)
                        26.000M objects (     2.000  retained)
                        29.000  strings (     1.000  retained)


## skip-javascript.md

      
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                / skip-javascript.md
            
            
              Created
              March 17, 2018 00:44
            
          
    diff --git a/Gemfile b/Gemfile
index 9d19ebf..2f56cf4 100644
--- a/Gemfile
+++ b/Gemfile
@@ -14,13 +14,6 @@ gem 'pg', '>= 0.18', '< 2.0'
 gem 'puma', '~> 3.7'
 # Use SCSS for stylesheets
 gem 'sass-rails', '~> 5.0'

  
## ternary_equal_notequal.rb
require 'benchmark/ips'

def ternary_equal
  (true == true) ? true : false
end

def ternary_not_equal
  (true != false) ? true : false
end

## sicp_2_23.scm
(define (for-each proc items)
  (if (null? items)
    #f
    (begin
      (proc (car items))
      (for-each proc (cdr items)))
  )
)
(for-each (lambda (x) (newline) (display x)) (list 57 321 88))
	```
	$ rake
	Run options:

	# Running tests:

	Finished tests in 1.893467s, 224.9841 tests/s, 4058.1642 assertions/s.
	426 tests, 7684 assertions, 0 failures, 0 errors, 0 skips

	ruby -v: ruby 2.5.3p105 (2018-10-18 revision 65156) [x86_64-darwin17]
	require 'benchmark/ips'

	def ternary_equal
	(true == true) ? true : false
	end

	def ternary_not_equal
	(true != false) ? true : false
	end
	(define (for-each proc items)
	(if (null? items)
	#f
	(begin
	(proc (car items))
	(for-each proc (cdr items)))
	)
	)
	(for-each (lambda (x) (newline) (display x)) (list 57 321 88))