ofGetLastFrameTime() bug.

code example:

int index;
void ofApp::setup(){
    ofSleepMillis(3000);
    index = 0;
    printf("setup\n");
}

void ofApp::update(){
    if(index < 5)
    {
        printf("update\n");
        printf("%d - %f\n",index,(float)ofGetLastFrameTime());
        ++ index;
    }
}

void ofApp::draw(){
    if(index < 5) printf("draw\n");
}

console print:

setup
update
0 - 0.000000
draw
update
1 - 3.350256  => bug.....
draw
update
2 - 0.061795
draw
update
3 - 0.000984
draw
update
4 - 0.015198

Start by locating the implementation and update path for ofGetLastFrameTime(), then reproduce the provided setup/update sequence with the three-second sleep. Compare the reported first-frame interval with the timing state across subsequent frames; done means the function reports consistent frame timing after setup.