In general is a data playback function I wrote
In thread reads binary file, 240 * 64 * 100 bytes per read, read at the same time, each 240 - byte processing (read progress display to the interface, test read data at the same time, passed into the cache, set with 64 frames after packaging 240 * 64 bytes sent via UDP to others), to deal with a sleep 1 millisecond, debugging in Qtcreator environment when feeling a bit slow, but can accept, if direct running exe, closed Qtcreator, can see from the interface schedule, extremely slow like stuck, open an empty Qtcreator at this time, do not need to load any program, speed immediately becomes and debugging read speed, then shut down just open Qtcreator, speed immediately came down again, to solve!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!