void onDraw(const int loops, SkCanvas*) override {
SkRandom r;
enum {
kMaxObjects = 4 * (1 << 10),
};
A* objects[kMaxObjects];
// We delete if a random [-1, 1] fixed pt is < the thresh. Otherwise,
// we allocate. We start allocate-biased and ping-pong to delete-biased
SkFixed delThresh = -SK_FixedHalf;
const int kSwitchThreshPeriod = loops / (2 * kMaxObjects);
int s = 0;
int count = 0;
for (int i = 0; i < loops; i++, ++s) {
if (kSwitchThreshPeriod == s) {
delThresh = -delThresh;
s = 0;
}
SkFixed del = r.nextSFixed1();
if (count &&
(kMaxObjects == count || del < delThresh)) {
delete objects[count-1];
--count;
} else {
objects[count] = new A;
++count;
}
}
for (int i = 0; i < count; ++i) {
delete objects[i];
}
}
