'use strict';

const s = new WeakSet();
let j = 0;
function f(){
    for (let i = 0 ; i<100000; i++) {
        s.add({});  
    }
    console.log(`${j++} :${0|(process.memoryUsage().heapUsed/(1024*1024))}MB`);
    return Promise.resolve(null).then(f);
}
f();

...
110 :853MB

<--- Last few GCs --->

   10993 ms: Scavenge 825.2 (856.1) -> 823.2 (863.1) MB, 49.7 / 0 ms [allocation failure].
   11126 ms: Scavenge 832.1 (863.1) -> 830.1 (870.1) MB, 43.4 / 0 ms [allocation failure].
   11255 ms: Scavenge 839.0 (870.1) -> 837.0 (877.1) MB, 44.6 / 0 ms [allocation failure].
   11390 ms: Scavenge 845.8 (877.1) -> 843.9 (884.1) MB, 47.5 / 0 ms [allocation failure].
   11517 ms: Scavenge 852.7 (884.1) -> 850.8 (891.1) MB, 42.5 / 0 ms [allocation failure].


<--- JS stacktrace --->

==== JS stack trace =========================================

Security context: 0000029D869E3AD1 <JS Object>
    1: add [native weak-collection.js:~92] [pc=0000036347B55F9B] (this=000003208D656691 <JS WeakSet>,k=00000167E7F946E9 <an Object with map 0000027C0AC172F1>)
    2: f(aka f) [C:\Users\michal.wadas\Documents\test_gc.js:7] [pc=0000036347B536C1] (this=0000029D86904189 <undefined>)
    3: arguments adaptor frame: 1->0
    4: /* anonymous */(aka /* anonymous */) [native promise.js:221] [pc=000003...