I have finally discovered the cause of the slow down
in the score processing after 5.14.2 (score in memory).

The prior episode is here

http://csound.1045644.n5.nabble.com/score-processing-in-memory-is-slow-with-micro-events-td5595868.html

`sscanf' in `corfile_get_flt' (corfiles.c) is a turtle so I have rewritten

MYFLT corfile_get_flt(CORFIL *f)
{
    int n = f->p;
    MYFLT ans;
    while(!isspace(f->body[++f->p]));
    ans = (MYFLT) atof(&f->body[n]);
    return ans;
}

and with the first test (0.001 msec) I get

csound test.orc test.sco                                                                    
...                                                                                         
Elapsed time at end of performance: real: 0.947s, CPU: 0.290s
...

Success.

Let me know if I can "rapidly" to apply it or if you have a better solution.

tito

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