Perf/£/GB on RAM for PCPartPicker

perfpricegb.js

// https://uk.pcpartpicker.com/products/memory/#page=1
// Visit site, run script in console / greasemonkey / etc

var max_perf  = 3200 / 17;    // reasonable
var max_value = max_perf / 6; //  defaults

// TODO:
// - look at all items then pick best, don't use defaults
// - resort the list based on best values

function best_picks(item) {
	let speed = item.querySelector("td.td__spec--1").innerText.substr(5); // DDR4- or DDR5-
	let cas   = item.querySelector("td.td__spec--6").innerText;
	let name  = item.querySelector("td.td__name").innerText;
	let pergb = item.querySelector("td.td__spec--3").innerText.substr(1);
	let perf  = (speed / cas);
	let value = (perf / pergb);
	if (perf > max_perf) {
		max_perf=perf;
		console.log(name, perf, value);
		item.style.border="5px solid red";
	}
	if (value > max_value) {
		max_value=value;
		console.log(name, perf, value);
		if (item.style.border == "5px solid red") {
			item.style.border="5px dashed gold";
		} else {
			item.style.border="5px solid green";
		}
	}
}

document.querySelectorAll("#category_content tr").forEach( best_picks );