VK patch reduces background VK messenger traffic 100 times

vk-fixes.user.js

// ==UserScript==
// @name        VK fixes
// @namespace   vk-com
// @include     https://vk.com/*
// @include     http://vk.com/*
// @version     1
// @grant       none
// ==/UserScript==

/* recommended filters in addition to EasyList

! =========================
! VK filers
! =========================
$third-party,domain=vk.com
@@||vk.me^
@@||vk-cdn.net^
/q_frame.php$subdocument,domain=vk.com
vk.com###feed_recommends
! VK API on other sites
||vk.com/js/api/openapi.js*$third-party
! VK Widgets on other sites
||vk.com/widget*$domain=~vk.com
##a[href^="https://vk.com/share.php?url="]

*/

let oldPost = window.ajax.post;
let regex = /al_update_ad/;

window.ajax.post = function (url, args, args2) {
    if (regex.test(url)) {
        return;
    }
    if (args && args.act) {
        switch (args.act) {
            case 'a_typing':
            case 'a_mark_read':
            case 'a_mark':
                //args2 && args2.onDone && args2.onDone();
                return;
        }
    }

    oldPost.apply(this, arguments);
}