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print("Stress test of ropes");
if (typeof newRope === "undefined") {
var newRope = SpecialPowers.Cu.getJSTestingFunctions().newRope;
}
if (typeof ensureLinearString === "undefined") {
var ensureLinearString = SpecialPowers.Cu.getJSTestingFunctions().ensureLinearString;
}
function createRopes() {
const ropes = {};
let j = 88;
function advance() {
// This is totally made up and probably stupid.
j = ((((j * 7) >> 2) + j) + (j << 3)) | 0;
return j;
}
function randomBalancedRope(height) {
if (height == 0)
return "abcdefghij" + j;
const left = randomBalancedRope(height - 1);
advance();
const right = randomBalancedRope(height - 1);
advance();
return newRope(left, right, {nursery:(j & 1)});
}
// Construct a fairly big random rope first. If we did it later, then the
// chances of it all ending up tenured are higher.
ropes.balanced = randomBalancedRope(10);
ropes.simple = newRope("abcdefghijklm", "nopqrstuvwxyz");
ropes.simple_tenured = newRope("abcdefghijklm", "nopqrstuvwxyz", {nursery:false});
ropes.tenured_nursery = newRope("a", newRope("bcdefghijklm", "nopqrstuvwxyz", {nursery:true}), {nursery:false});
ropes.nursery_tenured = newRope("a", newRope("bcdefghijklm", "nopqrstuvwxyz", {nursery:false}), {nursery:true});
return ropes;
}
const ropes = createRopes();
// Flatten them all.
for (const [name, rope] of Object.entries(ropes))
ensureLinearString(rope);
// GC with them all live.
let ropes2 = createRopes();
gc();
// GC with them all dead.
ropes2 = null;
gc();
if (typeof reportCompare === "function")
reportCompare(true, true);
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