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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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