uncleflo
Registered since September 28th, 2017
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How to Read a File Line by Line in a Shell Script
Saved by uncleflo on January 27th, 2017.
There are many ways to handle any task on a Unix platform, but some techniques that are used to process a file waste a lot of CPU time. Most of the wasted time is spent in unnecessary variable assignment and continuously opening and closing the same file over and over. Using a pipe also has a negative impact on the timing. In this article I will explain various techniques for parsing a file line by line. Some techniques are very fast and some make you wait for half a day. The techniques used in this article are measurable, and I tested each technique with time command so that you can see which techniques suits your needs.
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Saved by uncleflo on May 5th, 2013.
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