Hi,
I have a large binary file consisting 3000x3000x2000 floating data points (around 67G in size). For each interval of 2000, I need to read one float value. So in total I need to read 3000x3000 points. What is the fastest way to read it?
I did the following way and it takes a decade to read it out.
Qt Code:
qint64 pos( 0); char data[ 4 ]; for ( int ix = 0; ix < 3000; ix++ ) { for ( int iy = 0; iy < 3000; iy++ ) { stream.device()->seek( pos ); stream.readRawData( data, 4 ); ... pos += 2000; } }To copy to clipboard, switch view to plain text mode
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