Vodafone has again topped Truenet's broadband charts in January, remaining the ISP with the best ADSL performance.
TelstraClear Cable remains the best overall performer, while TelstraClear's ADSL rankings climbed to second.
This makes a total of five ISPs downloading Truenet's dummy webpage in less than 0.5s, up from two when it started reporting in August.
Orcon downloads, however, slowed to more than 0.5s in testing.
While Snap was slowest at opening a dummy test webpage, the ISP had consistent file download speeds throughout the day – best at 6pm during peak usage hour, and slowest (97 percent of best) at 3am when Internet usage is at its lowest ebb. This pattern is opposite to most ISPs, Truenet says.
Telecom, which has good webpage performance, also has consistent file download speeds throughout the day, and is equal to Snap for overall time of day performance. Telecom's performance shows an off-peak/peak performance typical of most other ISPs, with the worst measurement occurring at 6pm.
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