Technically, the format splits a disc image into fixed-size "hunks" that are each compressed independently and indexed. This ingenious design allows emulators to quickly locate and load data without the performance bottlenecks of other compression types.
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Because CHD compresses data into hunks, the emulator loads a compressed block into RAM and decompresses it instantly. This actually results in fewer read operations from your storage drive. On modern hardware (SSDs), CHD runs identically to BIN. On mechanical HDDs, it can sometimes load due to reduced seek times. Technically, the format splits a disc image into