Following are some troubleshooting steps you can try out -
Flush the DNS & renew your IP settings - As shown below, use ipconfig /flushdns command to clear the DNS cache. If the problem persist, restart your network adapter or router (Control Panel > Network & Sharing Center > Network Connections) by disabling & enabling the device.
If the response time to Gateway looks okay then try to use services like PingTest.net to see the response time to server or try ping -t www.google.com . You should look for consistent response time to conclude the problem is no more.
Another service which can improve your DNS query performance is openDNS which was discussed earlier. More details on opendns here.
Other Sensible Options You Can Try!
- Use ad blocker plugins like adThwart in the browser to stop loading unwanted, byte crunching data & animations.
- Use of caching softwares like squid speed up your browsing capacity by efficiently using bandwidth.
- Cleaning your browser history. Recommended : Store only 1 day of history in your browser.
- Stop using Google toolbars or similar toolbars which consumes bandwidth in background.
- Apply the latest updates provided by software vendors.
If nothing work out, call your ISP to check modem settings and other network equipment settings.