To tell the truth, if you have malware on your website, degraded page loading is the least of the problems it causes. Your visitors are probably being sent off to bogus sites, losing control of their financial information, or seeing scam advertisements. Search engines will notice your site is acting strangely and stop listing it.
Sometimes, if you're lucky, poor performance is the main result. The perpetrators could have been caught and their systems taken down, but infected sites will keep trying to contact them. Some malicious code, such as cryptominers, is all about theft of resources. A lot of malware is just broken, but it still slows the server down. And if your site is infected, it's vulnerable to other, more damaging threats.
Sometimes a drop in performance is the first clue that there is an infection. If the drop is sudden, that's a strong reason to think something has gone wrong on the server. If your page load times have gone up, you should assess all the possible factors before throwing money at more expensive servers or a CDN. You might be solving the wrong problem.
Solid protection against online threats will guard your site against present and future performance degradation due to malware. Quttera's
ThreatSign service includes a number of website protection tools, including malware cleanup to eliminate current problems, as well as a suite of tools to prevent future infections. The Web Application Firewall blocks hostile requests. Site monitoring detects suspicious activity quickly. External or internal malware scanning spots new infections. Blacklist removal gets you back into the search engine result pages.
With a well-protected website, your data is safe, your users are safe, and you're at less risk of slow page loading issues. Sign up for ThreatSign, and you'll find it's a win in many ways.