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Full Discussion: How to replace all but the first 3 characters with sed?
Top Forums Shell Programming and Scripting How to replace all but the first 3 characters with sed? Post 302935243 by disedorgue on Friday 13th of February 2015 04:32:38 PM
Old 02-13-2015
Here profiling data of run java:
Code:
Flat profile of 0,76 secs (58 total ticks): main

  Interpreted + native   Method                        
 17,2%     0  +    10    java.io.FileOutputStream.writeBytes
  6,9%     0  +     4    java.lang.System.arraycopy
  3,4%     2  +     0    java.io.BufferedOutputStream.flush
  3,4%     2  +     0    java.util.Arrays.copyOfRange
  3,4%     2  +     0    java.io.BufferedWriter.write
  1,7%     1  +     0    java.lang.String.indexOf
  1,7%     1  +     0    sun.nio.cs.StreamEncoder.isOpen
  1,7%     1  +     0    java.nio.CharBuffer.wrap
  1,7%     1  +     0    java.io.BufferedReader.ensureOpen
  1,7%     1  +     0    sun.nio.cs.StreamEncoder.flushBuffer
  1,7%     1  +     0    java.io.PrintStream.write
  1,7%     1  +     0    sun.nio.cs.UTF_8$Decoder.decodeArrayLoop
 46,6%    13  +    14    Total interpreted

         Stub + native   Method                        
 44,8%     0  +    26    java.io.FileOutputStream.writeBytes
  5,2%     0  +     3    java.lang.System.arraycopy
 50,0%     0  +    29    Total stub

  Thread-local ticks:
  3,4%     2             Class loader


Global summary of 0,77 seconds:
100,0%    58             Received ticks
120,7%    70             Compilation
  3,4%     2             Class loader

real	0m0.908s
user	0m0.757s
sys	0m0.220s

Regards.

---------- Post updated at 10:32 PM ---------- Previous update was at 10:03 PM ----------

A ruby version it's my first ruby line, so I not sure that this line is the best...
Code:
time ruby -pe 'print $_[0,3]+"*"*($_.length-4)+"\n"' file1 >/dev/null 

real	0m0.092s
user	0m0.087s
sys	0m0.003s

Regards.
 

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LEARN ABOUT CENTOS

git-check-attr

GIT-CHECK-ATTR(1)						    Git Manual							 GIT-CHECK-ATTR(1)

NAME

       git-check-attr - Display gitattributes information

SYNOPSIS

       git check-attr [-a | --all | attr...] [--] pathname...
       git check-attr --stdin [-z] [-a | --all | attr...] < <list-of-paths>

DESCRIPTION

       For every pathname, this command will list if each attribute is unspecified, set, or unset as a gitattribute on that pathname.

OPTIONS

       -a, --all
	   List all attributes that are associated with the specified paths. If this option is used, then unspecified attributes will not be
	   included in the output.

       --cached
	   Consider .gitattributes in the index only, ignoring the working tree.

       --stdin
	   Read file names from stdin instead of from the command-line.

       -z
	   Only meaningful with --stdin; paths are separated with a NUL character instead of a linefeed character.

       --
	   Interpret all preceding arguments as attributes and all following arguments as path names.

       If none of --stdin, --all, or -- is used, the first argument will be treated as an attribute and the rest of the arguments as pathnames.

OUTPUT

       The output is of the form: <path> COLON SP <attribute> COLON SP <info> LF

       <path> is the path of a file being queried, <attribute> is an attribute being queried and <info> can be either:

       unspecified
	   when the attribute is not defined for the path.

       unset
	   when the attribute is defined as false.

       set
	   when the attribute is defined as true.

       <value>
	   when a value has been assigned to the attribute.

EXAMPLES

       In the examples, the following .gitattributes file is used:

	   *.java diff=java -crlf myAttr
	   NoMyAttr.java !myAttr
	   README caveat=unspecified

       o   Listing a single attribute:

	   $ git check-attr diff org/example/MyClass.java
	   org/example/MyClass.java: diff: java

       o   Listing multiple attributes for a file:

	   $ git check-attr crlf diff myAttr -- org/example/MyClass.java
	   org/example/MyClass.java: crlf: unset
	   org/example/MyClass.java: diff: java
	   org/example/MyClass.java: myAttr: set

       o   Listing all attributes for a file:

	   $ git check-attr --all -- org/example/MyClass.java
	   org/example/MyClass.java: diff: java
	   org/example/MyClass.java: myAttr: set

       o   Listing an attribute for multiple files:

	   $ git check-attr myAttr -- org/example/MyClass.java org/example/NoMyAttr.java
	   org/example/MyClass.java: myAttr: set
	   org/example/NoMyAttr.java: myAttr: unspecified

       o   Not all values are equally unambiguous:

	   $ git check-attr caveat README
	   README: caveat: unspecified

SEE ALSO

       gitattributes(5).

GIT

       Part of the git(1) suite

Git 1.8.3.1							    06/10/2014							 GIT-CHECK-ATTR(1)
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