Following up on the previous off-peak test:[Hong Kong CMI] Quick test of YxVM VOL (throttled version) and ISIF CM
Some forum members wanted to see evening-peak results, so I retested it. Thanks to @vpsex and @Hconps for providing some equipment for testing 
In summary, VOL return speeds to China Mobile have, surprisingly, improved compared with the previous test, while everything else is basically the same. Overall, ISIF CM currently offers a slightly better browsing experience than VOL
| Plan |
🇭🇰 YxVM Volume |
🇭🇰 ISIF HKG-Bs-CM |
| Hardware |
1vCPU, 0.5GB RAM, 10 GB SSD |
1vCPU, 768MB RAM, 20 GB SSD |
| Traffic |
1TB (out) |
2000GB (in+out) |
| Route |
China Mobile via Lumen, Telecom/Unicom via CMI |
China Mobile via Lumen, Telecom/Unicom via CMI |
| Network |
1 x IPv4 + 1 x /64 IPv6 |
1 x IPv4 + 1 x /48 IPv6 |
| Cost |
Monthly USD$ 3.00 |
Monthly EUR€ 6.00 |
🌐 Network Quality
| 🇭🇰 YxVM VOL |
🇭🇰 ISIF CM |
 |
 |
⏬ iPerf3 single-thread TCP speed test (single test, 30 seconds each, 2025-08-19 21:00-23:00)
To reduce the impact of QoS policies on domestic IDC test nodes, this test includes a control group also located in Hong Kong, using 163pp/4837/CMI routes with 1Gbps peak bandwidth
As with the previous post, during evening peak, VOL CMI return to Telecom/Unicom is still capped below 100Mbps single-thread, and Lumen->CMI return to Mobile remains lower than ISIF
9929 and CN2 home broadband should be able to pull both VOL and ISIF CM well
But judging from East China home broadband, neither YxVM VOL nor ISIF CM performs well on Mobile or Telecom
| Node |
Download from YxVM |
Retransmits |
Average latency |
Download from ISIF |
Retransmits |
Average latency |
Download from control group |
Retransmits |
Average latency |
| East China Mobile 🇨🇳 home broadband @1Gbps |
95.5Mbps |
26510 |
- |
143Mbps |
16886 |
- |
402Mbps |
1301 |
- |
| Guangdong Mobile 🇨🇳 Yunxi Huanjing @2Gbps |
320Mbps |
49669 |
20.681ms |
489Mbps |
4609 |
22.878ms |
683Mbps |
9655 |
19.315ms |
| Wuhan Mobile 🇨🇳 Yunxi Huanjing @2Gbps |
104Mbps |
34314 |
49.941ms |
201Mbps |
944 |
54.085ms |
546Mps |
1 |
52.029ms |
| East China Telecom 🇨🇳 home broadband @1Gbps |
57.0Mbps |
18668 |
86.239ms |
55.8Mbps |
18396 |
28.737ms |
815Mbps |
1 |
31.688ms |
| Shenzhen Telecom 🇨🇳 Yi'an Cloud @1Gbps |
78.5Mbps |
31091 |
36.783ms |
166Mbps |
51225 |
11.157ms |
871Mbps |
0 |
11.138ms |
| Wuhan Telecom 🇨🇳 Yi'an Cloud @1Gbps |
81.4Mbps |
36470 |
48.888ms |
119Mbps |
22860 |
43.890ms |
550Mbps |
0 |
45.643ms |
| Ningbo Telecom 🇨🇳 Wuyu Cloud @500Mbps |
89.7Mbps |
28956 |
39.256ms |
478Mbps |
25 |
37.765ms |
482Mbps |
114 |
39.122ms |
| Ningbo Telecom 🇨🇳 Seagull Cloud @800Mbps |
95.9Mbps |
27894 |
38.551ms |
524Mbps |
3 |
35.870ms |
643Mbps |
0 |
32.805ms |
| Shanghai TelecomCN2 🇨🇳 Liqun @300Mbps |
172Mbps |
62570 |
30.626ms |
273Mbps |
4957 |
32.232ms |
285Mbps |
6600 |
33.092ms |
| Qingdao Unicom 🇨🇳 Yunxi Huanjing @2Gbps |
95.4Mbps |
25940 |
83.818ms |
464Mbps |
7 |
43.338ms |
519Mbps |
0 |
45.032ms |
| Beijing Unicom 9929 🇨🇳 Kuxue Cloud @1Gbps |
267Mbps |
3778 |
40.743ms |
379Mbps |
1 |
46.581ms |
350Mbps |
25 |
41.237ms |
🇨🇳 East China Mobile home broadband Test 1 @1Gbps
| 🇭🇰 YxVM VOL |
🇭🇰 ISIF CM |
🇭🇰 Control group |
 |
 |
 |
🇨🇳 East China Mobile home broadband Test 2 @1Gbps
| 🇭🇰 YxVM VOL |
🇭🇰 ISIF CM |
🇭🇰 Control group |
 |
 |
 |
🇨🇳 Guangdong Mobile Yunxi Huanjing @2Gbps
| 🇭🇰 YxVM VOL |
🇭🇰 ISIF CM |
🇭🇰 Control group |
 |
 |
 |
🇨🇳 Wuhan Mobile Yunxi Huanjing @2Gbps
| 🇭🇰 YxVM VOL |
🇭🇰 ISIF CM |
🇭🇰 Control group |
 |
 |
|
🇨🇳 East China Telecom home broadband Test 1 @1Gbps
| 🇭🇰 YxVM VOL |
🇭🇰 ISIF CM |
🇭🇰 Control group |
 |
 |
 |
🇨🇳 East China Telecom home broadband Test 2 @1Gbps
| 🇭🇰 YxVM VOL |
🇭🇰 ISIF CM |
🇭🇰 Control group |
 |
 |
 |
🇨🇳 Shenzhen Telecom Yi'an Cloud @1Gbps
| 🇭🇰 YxVM VOL |
🇭🇰 ISIF CM |
🇭🇰 Control group |
 |
 |
 |
🇨🇳 Wuhan Telecom Yi'an Cloud @1Gbps
| 🇭🇰 YxVM VOL |
🇭🇰 ISIF CM |
🇭🇰 Control group |
 |
 |
 |
🇨🇳 Ningbo Telecom Wuyu Cloud @500Mbps
| 🇭🇰 YxVM VOL |
🇭🇰 ISIF CM |
🇭🇰 Control group |
 |
 |
 |
🇨🇳 Ningbo Telecom Seagull Cloud @800Mbps
| 🇭🇰 YxVM VOL |
🇭🇰 ISIF CM |
🇭🇰 Control group |
 |
 |
 |
🇨🇳 Shanghai TelecomCN2 Liqun @300Mbps
| 🇭🇰 YxVM VOL |
🇭🇰 ISIF CM |
🇭🇰 Control group |
 |
 |
 |
🇨🇳 Qingdao Unicom Yunxi Huanjing @2Gbps
| 🇭🇰 YxVM VOL |
🇭🇰 ISIF CM |
🇭🇰 Control group |
 |
 |
 |
🇨🇳 Beijing Unicom 9929 Kuxue Cloud @1Gbps
| 🇭🇰 YxVM VOL |
🇭🇰 ISIF CM |
🇭🇰 Control group |
 |
 |
 |
🔗 About The Tests
Many thanks to @vpsex and @Hconps for helping with testing. Apart from that, all machines used in this article were purchased at my own expense; TCP tuning was limited to enabling BBR+FQ, with all other parameters left at defaults; results may be time-sensitive