// You'd think that work items that span entire rows rather than squarish 2d regions would be faster because they'd
// have fewer calls to metric.setTree1, but it turns out they're about 5% slower. [Robb P. Matzke 2014-09-27]
void init() {
WorkItem toDo;
while (workList.next().assignTo(toDo)) {
for (size_t i=toDo.iBegin; i<toDo.iEnd; ++i) {
if (i<functions1.size()) {
metric.setTree1(functions1[i]);
for (size_t j=toDo.jBegin; j<toDo.jEnd; ++j) {
if (j<functions2.size()) {
distance(i, j) = metric.compute(functions2[j]).relativeCost();
} else {
distance(i, j) = 0.0;
}
}
} else {
for (size_t j=toDo.jBegin; j<toDo.jEnd; ++j) {
distance(i, j) = 0.0;
}
}
}
}
}
