JITofrubini?

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The very simple module jit
does read the string by using different delays
like busy looping,schedule() calling etc

when a command is given
like dd if=/proc/litbusy bs=1

then it reads 1 by 1 characters and read once in a
second 
but if given command
cat /proc/jitbusy
 suddenly makes fast loop
dumping on the screen the strings of 1 memory page
long

can anybody explains this  behaviour??

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