Speedtest results differ from what the Speedtest CLI reports

[lucymhdavies]

With the CLI:

root@nclient-rpi-46ec8662-tainted:~# ./speedtest

   Speedtest by Ookla

     Server: razorblue - Leeds (id = 17449)
        ISP: Sky Broadband
    Latency:    11.74 ms   (0.83 ms jitter)
   Download:   736.45 Mbps (data used: 1.1 GB )
     Upload:   108.14 Mbps (data used: 191.4 MB )
Packet Loss:     0.0%

However, the exporter consistently reports less than that. For example:

INFO[0126] Speedtest exporter starting                   source="speedtest_exporter.go:88"
2022/08/05 09:48:21 Testing download speed
2022/08/05 09:48:21 Starting test at: 2022-08-05 09:48:21.920180567 +0100 BST m=+126.629379847
.2022/08/05 09:48:21 Starting test at: 2022-08-05 09:48:21.96699229 +0100 BST m=+126.676191439
.2022/08/05 09:48:22 Starting test at: 2022-08-05 09:48:22.015578141 +0100 BST m=+126.724777310
.2022/08/05 09:48:22 Starting test at: 2022-08-05 09:48:22.074364678 +0100 BST m=+126.783563847
.2022/08/05 09:48:22 Starting test at: 2022-08-05 09:48:22.145855901 +0100 BST m=+126.855055069
.2022/08/05 09:48:22 Starting test at: 2022-08-05 09:48:22.333710697 +0100 BST m=+127.042909846
.2022/08/05 09:48:22 Starting test at: 2022-08-05 09:48:22.588437363 +0100 BST m=+127.297636513
.2022/08/05 09:48:23 Starting test at: 2022-08-05 09:48:23.011429437 +0100 BST m=+127.720628605
.2022/08/05 09:48:23 Starting test at: 2022-08-05 09:48:23.478775511 +0100 BST m=+128.187974679
.2022/08/05 09:48:24 Starting test at: 2022-08-05 09:48:24.091344918 +0100 BST m=+128.800544068
.
INFO[0129] Speedtest Download: 203.33081262373443 Mbps   source="client.go:91"
2022/08/05 09:48:25 Testing upload speed
2022/08/05 09:48:25 Starting test at: 2022-08-05 09:48:25.174871121 +0100 BST m=+129.884070363
2022/08/05 09:48:25 Starting test at: 1659689305174871121 (nano)
2022/08/05 09:48:25 Finishing test at: 2022-08-05 09:48:25.221817658 +0100 BST m=+129.931016826
2022/08/05 09:48:25 Finishing test at: 1659689305221817658 (nano)
2022/08/05 09:48:25 Took: 46946463 (nano)
.2022/08/05 09:48:25 Starting test at: 2022-08-05 09:48:25.257852028 +0100 BST m=+129.967051178
2022/08/05 09:48:25 Starting test at: 1659689305257852028 (nano)
2022/08/05 09:48:25 Finishing test at: 2022-08-05 09:48:25.331548176 +0100 BST m=+130.040747345
2022/08/05 09:48:25 Finishing test at: 1659689305331548176 (nano)
2022/08/05 09:48:25 Took: 73696167 (nano)
.2022/08/05 09:48:25 Starting test at: 2022-08-05 09:48:25.402849213 +0100 BST m=+130.112048382
2022/08/05 09:48:25 Starting test at: 1659689305402849213 (nano)
2022/08/05 09:48:25 Finishing test at: 2022-08-05 09:48:25.509839843 +0100 BST m=+130.219039011
2022/08/05 09:48:25 Finishing test at: 1659689305509839843 (nano)
2022/08/05 09:48:25 Took: 106990629 (nano)
.2022/08/05 09:48:25 Starting test at: 2022-08-05 09:48:25.61713788 +0100 BST m=+130.326337048
2022/08/05 09:48:25 Starting test at: 1659689305617137880 (nano)
2022/08/05 09:48:25 Finishing test at: 2022-08-05 09:48:25.759140361 +0100 BST m=+130.468339529
2022/08/05 09:48:25 Finishing test at: 1659689305759140361 (nano)
2022/08/05 09:48:25 Took: 142002481 (nano)
.2022/08/05 09:48:25 Starting test at: 2022-08-05 09:48:25.901137472 +0100 BST m=+130.610336659
2022/08/05 09:48:25 Starting test at: 1659689305901137472 (nano)
2022/08/05 09:48:26 Finishing test at: 2022-08-05 09:48:26.081011454 +0100 BST m=+130.790210622
2022/08/05 09:48:26 Finishing test at: 1659689306081011454 (nano)
2022/08/05 09:48:26 Took: 179873963 (nano)
.
INFO[0130] Speedtest Upload: 72.37444943025025 Mbps      source="client.go:93"
2022/08/05 09:48:26 Testing latency: London (BRSK)
2022/08/05 09:48:26 	Run took: 16.092685ms
2022/08/05 09:48:26 Testing latency: London (BRSK)
2022/08/05 09:48:26 	Run took: 17.106259ms
2022/08/05 09:48:26 Testing latency: London (BRSK)
2022/08/05 09:48:26 	Run took: 17.993722ms
2022/08/05 09:48:26 Testing latency: London (BRSK)
2022/08/05 09:48:26 	Run took: 15.864056ms
2022/08/05 09:48:26 Testing latency: London (BRSK)
2022/08/05 09:48:26 	Run took: 15.939074ms
INFO[0130] Speedtest Latency: 15.864056 ms               source="client.go:100"
INFO[0130] Speedtest results: map[download:%!s(float64=203.33081262373443) ping:%!s(float64=15.864056) upload:%!s(float64=72.37444943025025)]  source="client.go:104"
INFO[0130] Speedtest exporter finished                   source="speedtest_exporter.go:98"

$ curl -s nclient-rpi-46ec8662-tainted:9112/metrics | grep "download\|upload"
# HELP speedtest_download Download bandwidth (Mbps).
# TYPE speedtest_download gauge
speedtest_download 203.33081262373443
# HELP speedtest_upload Upload bandwidth (Mbps).
# TYPE speedtest_upload gauge
speedtest_upload 72.37444943025025

Is there some configuration I'm missing?

[stale]

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