FWIW I looked at chuck to run on my performance wearable (500 MHz P3) and all I got was dropouts. Pd runs great in realtime on the same machine ...
That's because ChucK has its DSP loop set at per sample whereas Pd calculates everything in 64-byte chunks. While latter gives you a relief from the CPU load, it also lowers the actual control over DSP processes, so you can't exactly pinpoint a sample and translate its trigger into a non-signal domain beyond being sure that the event was triggered when the sample in question was located within the last 64-byte buffer.
HTH
ico