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In my dashboard I want to see a value trending in time.
Each minute we get a value out of the building management system.
For each sensor, in total 40 sensors, there is a text file with two parameters: Date and value
08-01-2015 15:06:00; 33
08-01-2015 15:07:00; 35
08-01-2015 15:08:00; 38
In the script the text file are combine together by the date.
For 1 month we have about 45.000 rows and 40 columns.
The problem is that the file is very slow and I thinks its due the script.
The file is attach.
Can you help me to make the file faster?