Multiple saves with writeDelay!=0 cause disk writes for every change

[iggu]

Looks like it is more correct to accumulate all changes and write them in a single write-to-disk and count timeout only from the last change (i.e. if timeout is set to 200 and multiple changes occur every 100 - then write when thery stop in a single bulk).
Or such an option would be appropriate alongside with writeDelay (say debounceDelay or something).

---

const trivialdb = require('trivialdb');
const tdbFslib = require('trivialdb/lib/fslib');

let wvi = 0, wvts = Date.now();
const tdb = tns.db("test", {
writeDelay: 200,
writeFunc: (path, str) => { console.log("W", ++wvi, wvts-Date.now(), str.length, "chars"); return tdbFslib.writeDB(path, str); }
});

tdb.loading.then(() => {
console.log('loaded.');
tdb.save({first: '1', last: 'a'})
.then(tdb.save.bind(tdb, {first: "2", last: "b"}, undefined))
.then(tdb.save.bind(tdb, {first: "3", last: "c"}, undefined))
.then(tdb.save.bind(tdb, {first: "4", last: "d"}, undefined))
;
});

---

loaded.
W 1 -203 85 chars
W 2 -208 168 chars
W 3 -210 251 chars
W 4 -212 334 chars

[Morgul]

The design intention was definitely for that to behave like a debounce. I'd be more than happy to review a MR that fixes that.