4种方法生成数列时间比较

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十万

bash

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# num.sh
date
for i in {1..100000}
do
echo $i
done
date

sh num.sh >num.txt
09:23:31
09:23:33  # 2秒

seq

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# work.sh
date
seq 1 100000
date

sh work.sh >num.txt
09:24:20
09:24:20  # 不到1秒

python

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# num.py
num = range(1,100001)
for i in num:
        print(i)
# work.sh
date
python num.py
date

sh work.sh >num.txt
09:26:02
09:26:03  # 1秒

ruby

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# num.rb
for i in 1..100000
  p i
end
# work.sh
date
ruby num.rb
date

sh work.sh >num.txt
09:26:58
09:27:01  # 3秒

一百万

bash

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# num.sh
date
for i in {1..1000000}
do
echo $i

done
date

sh num.sh >num.txt
09:14:26
09:14:51  # 25秒

seq

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# work.sh
date
seq 1 1000000
date

sh work.sh >num.txt
09:07:28
09:07:29  # 1秒

python

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# num.py
num = range(1,1000001)

for i in num:
        print(i)
# work.sh
date
python num.py
date

sh work.sh >num.txt
09:09:36
09:09:38  # 2秒

ruby

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# num.rb
for i in 1..1000000

  p i
end
# work.sh
date
ruby num.rb
date

sh work.sh >num.txt
09:12:27
09:12:46  # 19秒

两百万

bash

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sh num.sh >num.txt
09:37:51
09:38:41  # 50秒

seq

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sh work.sh >num.txt
09:39:48
09:39:48  # 不到1秒

python

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sh work.sh >num.txt
09:36:24
09:36:27  # 3秒

ruby

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4

sh work.sh >num.txt
09:34:15
09:34:59  # 44秒

五百万

bash

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sh num.sh >num.txt
09:41:59
09:44:07  # 2分8秒

seq

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sh work.sh >num.txt
09:41:11
09:41:12  # 1秒

python

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sh work.sh >num.txt
09:45:39 
09:45:43  # 4秒

ruby

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4

sh work.sh >num.txt
09:46:41
09:48:18  # 1分37秒

一千万

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bash
09:54:37
09:59:31  # 4分54秒
seq
09:51:55
09:51:56  # 1秒
python
09:53:32
09:53:43  # 9秒
ruby
09:55:56
09:59:41  # 3分45秒

一亿

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seq
09:57:14
09:57:16 # 2秒
python
10:02:47
10:04:16 # 1分29秒