latency comparison test and conclusion between singapore cn2 and domestic direct lines

introduction

this article focuses on "latency comparison testing and conclusions between singapore cn2 and domestic direct lines", using multi-node, multi-time active testing methods to evaluate average delay, packet loss rate and jitter. the goal is to provide actionable decision-making basis and optimization direction for cross-border business, cdn and enterprise connectivity.

test environment and methods

the test covers multiple backbone nodes from singapore to china, using ping, traceroute, mtr and iperf3 for icmp and tcp/udp performance sampling. each node samples several times during peak and non-peak periods, and calculates the average, median and 95th percentile to reduce the impact of occasional fluctuations.

cn2 line delay performance

in multiple tests, cn2 routing usually exhibits more stable low-to-medium latency, fewer routing hops, lower packet loss rate and lower jitter, making it suitable for delay-sensitive applications. the overall trend shows that cn2 can provide more consistent rtt performance in most time periods.

domestic direct line delay performance

domestic direct lines fluctuate more obviously under different operators and inter-network strategies. although the performance is close to cn2 during some periods, latency increases and path detours are prone to occur during peak periods or during cross-asn route switching, resulting in unstable user experience.

packet loss and jitter comparison

the comparison results show that cn2 is generally better than ordinary direct connections in terms of link quality and intermediate route stability, and packet loss and jitter are significantly lower. the jitter of directly connected lines increases during peak hours, especially on paths that pass through multiple relays or where there is cross-border backbone congestion.

routing path analysis

traceroute and as path analysis show that cn2 prefers to use carrier backbone direct connections and relay nodes with higher priority, with fewer hops and high-latency intermediate segments. domestic direct connections are affected by local egress policies and peer access, and the diversity of paths leads to large performance differences.

suggestions for practical application scenarios

if the business is highly sensitive to delay and jitter (online games, real-time voice and video interaction, financial transactions), priority should be given to cn2 high-quality dedicated lines or optimized routing strategies; if the business is cost-sensitive and traffic can tolerate certain fluctuations, domestic direct connection is still an option.

testing tools and retesting suggestions

it is recommended to use ping/mtr/iperf3 in different time windows for long-term sampling, combined with bgp routing change records. when retesting, focus on the 95th percentile delay, maximum jitter, and persistent packet loss. these indicators can better reflect the actual user experience.

conclusions and optimization suggestions

summary: singapore cn2 can provide lower and stable latency, less packet loss and jitter in most test scenarios, making it suitable for high-real-time services. domestic direct connection performance varies and needs to be evaluated based on specific operators and time periods. it is recommended to ensure cross-border connectivity through continuous monitoring, route optimization and multi-line backup.