Output
HTTP timing or host transfer throughput
UserBenchmark / All Tools / Loaded Latency Test
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Loaded Latency Test
Compare HTTP latency before and during a short download from this website.
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Loaded Latency Test · At a glance
Quick answer: Compare HTTP latency before and during a short download from this website. The difference is a loaded-latency observation.
Loaded Latency Test
The test loads when you open it. Device access is requested only after you choose to start.
Detailed guide
How to use this tool
- Compare baseline HTTP samples with samples during the short download.
- Keep the same route and connection for the comparison.
Input
Requests only to this website
Browser requirement
PHP endpoint; HTTPS hosting
Processing
Requests to this website; hosting can affect the result
How it works and what the result means
Latency is an HTTP round trip including TLS, server processing and browser overhead. Throughput is to this host and may be constrained by hosting, compression, caching or buffers.
Reading the result
The difference is a loaded-latency observation. If the file finishes too quickly to sustain load, the comparison can be inconclusive.
A loaded-latency test needs actual load
The baseline is a median of HTTP samples. A short download then runs alongside more samples. On a fast link the file can finish before those samples, making the difference inconclusive. No letter grade is assigned. A longer independent load is needed for a comprehensive bufferbloat assessment.
What to check next
Close unrelated transfers and repeat. A longer independent load is needed to assess fast links or upload saturation comprehensively.
This is not ICMP ping, UDP packet-loss measurement or a test of every internet route. The PHP endpoint must be enabled on the host. Timeouts are request failures, not measured network packet loss.
Frequently asked questions
Why is no bufferbloat grade assigned?
The bounded host-based load may not saturate the bottleneck long enough. Assigning a universal grade would overstate the measurement.
How do I start the Loaded Latency Test?
Start a short test to this website. Keep other downloads quiet when measuring baseline latency or throughput.
Does this tool require a download or an account?
No. Open the interactive tool above in a modern browser. The instructions and explanations are available even with JavaScript disabled; running a test needs JavaScript.
Why can two attempts give different results?
Power settings, background tasks, browser scheduling, operating-system input processing and device settings affect measurements. Compare repeated attempts with identical settings rather than the single highest score.