Do you run other people's code on the same core as important code? This is probably a really critical question for people who go to web sites where random enem

Do you run other people's code on the same core as important code? This is probably a really critical question for people who go to web sites where random enemies can bid on showing you malware / advertisements. If you're not running other people's code on your server, you probably don't need to worry as much about speculative execution attacks.