sankaku_fast_pagination.user.js

// ==UserScript==
// @name     Sankaku fast pagination
// @version  0.1
// @match    *://chan.sankakucomplex.com/*
// @grant    none
// @run-at   document-start
// ==/UserScript==

/* jshint esnext: true */
const originalSetTimeout = window.setTimeout;
window.setTimeout = function (...args) {
    if (/FADE_IN_DURATION/.test(args[0])) {
        args[1] /= 100;
    }
    originalSetTimeout(...args);
};