Batch script to find and replace a string in text file within a minute for files up to 12 MB

Question

I have written a batch script to replace a string in text file   Following is the script    echo off  amp setlocal set  search  1  set  replace  2  set  textfile Input txt  set  newfile Output txt   for  f  delims     i in   textfile   do       set  line   i      setlocal enabledelayedexpansion     set  line  line  search   replace        echo  line      endlocal    gt   newfile   del  textfile  rename  newfile    textfile    But for a 12MB file  it is taking close to 7 min  I want it to be under a minute  Can we make use of find or findstr command to reduce the time taken

User · Answer

How about this  set search  1 set replace  2 set textfile Input txt      python -c  quot with open   textfile     rw   as f  f write f read   replace   search      replace     quot   Muhahaha

User · Answer

Give this a shot    echo off setlocal  call  FindReplace  findstr   replacestr  input txt  exit  b    FindReplace  lt findstr gt   lt replstr gt   lt file gt  set tmp   temp  tmp txt  If not exist  temp    vbs call  MakeReplace for  f  tokens      a in   dir   3   s  b  a-d  on   do     for  f  usebackq    b in   Findstr  mic    1     a    do       echo  amp Echo Replacing    1  with    2  in file    nxa      lt   a cscript   nologo  temp    vbs    1     2  gt  tmp      if exist  tmp  move  Y  tmp      dpnxa  gt nul       del  temp    vbs exit  b   MakeReplace  gt  temp    vbs echo with Wscript  gt  gt  temp    vbs echo set args  arguments  gt  gt  temp    vbs echo  StdOut Write    gt  gt  temp    vbs echo Replace  StdIn ReadAll args 0  args 1  1 -1 1   gt  gt  temp    vbs echo end with

User · Answer

Just download fart  find and replace text  from here  use it in CMD  for ease of use I add fart folder to my path variable   here is an example   fart -r  C  myfolder      findSTR replaceSTR   this command will search in C  myfolder and all sub-folders and replace findSTR with replaceSTR  -r means process sub-folders recursively   fart is really fast and easy

User · Answer

Try this    echo off  amp setlocal setlocal enabledelayedexpansion  set  search  1  set  replace  2  set  textfile Input txt  set  newfile Output txt   for  f  delims     i in   textfile   do       set  line   i      set  line  line  search   replace        echo  line     gt   newfile   del  textfile  rename  newfile    textfile  endlocal

User · Answer

This uses a helper batch file called repl bat - download from   https   www dropbox com s qidqwztmetbvklt repl bat  Place repl bat in the same folder as the batch file or in a folder that is on the path   Repl bat is a hybrid batch file using native Windows scripting and is far faster than a regular batch script     The L switch makes the text search and replace a literal string and I d expect the 12 MB file to complete in several seconds on a modern PC    echo off  amp setlocal set  search   1  set  replace   2  set  textfile Input txt  set  newfile Output txt  call repl bat   search     replace   L  lt    textfile    gt   newfile   del   textfile   rename   newfile     textfile

User · Answer

A variant using Bat Powershell  need  net framework    replace bat     echo off  call DoReplace  Findstr   replacestr  test txt test1 txt exit  b   DoReplace echo   Get-Content   3       ForEach-Object      -replace  1   2      Set-Content  4 gt Rep ps1 Powershell exe -executionpolicy ByPass -File Rep ps1 if exist Rep ps1 del Rep ps1 echo Done pause

[batch-file] Batch script to find and replace a string in text file within a minute for files up to 12 MB

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