The chart updates continuously in real time but there will be a ~3 minute delay before you see the first result.

Concept:
2 spots are uploaded to WSPRnet.org every even minute by a Cloud server in New York.
The first is uploaded at even + 10 seconds and the next is uploaded at even + 20 seconds.
The WSPRnet server processing time and the time it takes to return an acknlowedgement (ack) are recorded.

The WSPRnet db is then queried for those two spots 10 seconds after the start of the next uneven minute.
The time taken for the db query results to be returned is also timed.
The Cloud server updates everyone's browser with each result within 3 seconds of receiving it.

The Chart
The chart bar values and spot count update in real time as returned data arrives.
Mouse over the chart bars for detailed upload and download times.
Failures will result in a red coloured bar element.

Normal times
Under light spot load, processing and ack combined take less than 300ms
The three smallest coloured squares are the healthy normal response times, less than 1 second.
Longer columns signify slow responses that are often well into the seconds.

Bar chart legend
Mouse over the coloured chart bar segments for detailed timing info.
●	1 spot uploaded at even minute + 10 seconds
●	1 spot uploaded at even minute + 20 seconds
●	WSPRnet DB query time at odd minute + 10 seconds
●	Pending or Failed WSPRnet network response