The latency test at tesmyinternetspeed.org provides exclusive result displaying the statistics about your bandwidth that is rare to find with other speed tests. You can check other test tools like upload test, ping test, download test, jitter test, latency test, wifi speed test, dsl speed test, broadband speed test with internet speed test tool. Feel free to use our ping test. Ping is tested via websockets technology. Results are close to ICMP ping (via cmd or console).

1. Ram Cas Latency Checker
2. Speedtest With Jitter And Latency
3. Latency Checker Windows 10
4. Latency Checker Dpc
5. Latency Checker Audio

Latency is the amount of time it takes for a computer or application to respond to your request. The less time it takes the better. This is a test where you want to score low and there's a theoretical limit to how low you can go. Zero. Meaning the response was instant. Absolute zero is impossible on this test.

Transmission Control Protocol or TCP is how you're able to see this page right now. The vast majority of your internet communication traverses this reliable, ordered and error-checked delivery of a stream of bytes.

a.k.a. TestMy Latency is not the average ICMP ping you get from your command line. TestMy Latency runs on the Transmission Control Protocol (TCP) (layer 4 - transport) where as normal ping runs on ICMP (layer 3 - network). ICMP is not used to exchange data between systems and has no way of interacting or detecting issues with the layers above it (layers 4 through 7). Your average command line ping simply can't give a full picture of what's happening on layer 4. TestMy Latency is different and tests at the transport layer.

“TCP Segment drops manifest as large increases in delay”

Read this latency test case study posted at stanford.edu on the difference between ICMP ping and TCP ping.

TL;DR TCP has more speed bumps

TestMy Latency is more sensitive than your typical ICMP ping for real connection issues. But both are complimentary to each other. ICMP will show you the best case, TestMy Latency (using TCP) isn't as forgiving. Even running this latency test on great computers with great networks shows that TCP isn't perfect. Don't expect a perfect score. But better computers on better networks always fair much better. Exactly what we like to test here. You can ping the servers from your command line at the same time you're testing to get a comparison. Because there is less to go wrong at the layer ping runs on you can expect a lower result from your command line. Think of it this way, TestMy Latency tests beyond normal ping so there are more variables that can affect the result. Equals higher result.

Hack TestMy Latency

Test using TestMy Latency on your own network. Host any http server, put this file under the folder /b/img/ then call TestMy Latency with the following URL: https://testmy.net/latency?internal=1&addr=[server-address] (e.g. https://testmy.net/latency?internal=1&addr=192.168.1.199) . This tool was first developed running on LAN to eliminate variables. It may be just as useful and helpful validation for your own testing to try a LAN test yourself.

Try different domains. A large majority of popular domains already work with TestMy Latency. Use this syntax https://testmy.net/latency?addr=[domain.name] (e.g. https://testmy.net/latency?addr=youtube.com)

Ram Cas Latency Checker

The Future of the Internet is low latency

Lower latency is ultra important, not just your transfer speed. With Starlink Satellite Constellation and the advent of 5G this tool will provide you with a way to test and compare your new found lower latency. Always keep TestMy.net in your mind.

* Note: Read into the newer 4 Layer Internet Model which puts ICMP on layer 2 and TCP on layer 3.
* Also see Don’t use ping [ICMP] for accurate delay measurements by Olivier Bonaventure author of Computer Networking : Principles, Protocols and Practice

Latest version: LatencyMon v 7.00

Speedtest With Jitter And Latency

LatencyMon checks if a system running Windows is suitable for processing real-time audio and other tasks. LatencyMon analyzes the possible causes of buffer underruns by measuring kernel timer latencies and reporting DPC and ISR execution times as well as hard pagefaults. It will provide a comprehensible report and find the kernel modules and processes responsible for causing audio latencies which result in drop outs. It also provides the functionality of an ISR monitor, DPC monitor and a hard pagefault monitor.
LatencyMon will display the highest latencies of a kernel timer and report the highest execution times of ISR and DPC routines as well as hard pagefaults. In most cases it will also find the drivers and processes responsible for executing them. It will create a comprehensible report which also displays all sampled data in a detailed manner allowing you to perform in-depth analysis.

The audio latency problem

Windows is not a real-time operating system. All requests to the operating system are delivered on a best effort basis. There are no guarantees whatsoever that requests are delivered within a certain time frame, which are the characteristics of a real-time operating system. That is not a problem for most devices and tasks but this is bad news for audio applications (which are considered soft real-time) because they need to deliver data to the subsystem and the hardware in buffers several times per second. If one or more buffers miss their deadlines and are not delivered in time it has audible consequences which are recognized as dropouts, clicks and pops.

About DPCs and ISRs

The Windows thread dispatcher (also known as scheduler) which is part of the kernel executes threads based on a priority scheme. Threads with higher priority will be given a longer execution time (also known as quantum or time slice) than threads with a lower priority. However the kernel also knows other types of units of execution known as interrupt service routines (ISRs). Devices connected to the system may interrupt on a connected CPU and cause their interrupt service routines to execute. An interrupt can occur on the same processor that an audio program is running on. Any thread that was running on the processor on which an interrupt occurred will be temporarily halted regardless of its priority. The interrupt service routine (ISR) is executed and may schedule a DPC (Deferred Procedure Call) to offload an amount of work. The DPC will most likely run immediately on the same processor which means the audio application will halt until both the ISR and the DPC routines have finished execution. That is because ISRs and DPCs run at elevated IRQL which means they cannot become preempted by the thread dispatcher (scheduler). Therefore to guarantee responsiveness of the system, ISR and DPC routines should execute as fast as possible. Guidelines say that they should not spend more than 100 µs of execution time however this is often not reached due to hardware factors beyond the control of the driver developer. If execution time gets too high, the audio program may be unable to deliver audio buffers to the hardware in a timely manner.

About hard pagefaults

Windows uses a concept of virtual memory which relies on the page translation system provided by the CPU. Whenever a memory address is requested which is not available in physical memory (not resident), an INT 14 will occur. The OS provided INT 14 handler will decide how to proceed next. If the page in which the address resides is known to Windows but not resident, Windows will read in the required page from the page file. That is known as a hard pagefault and can take a lot of time to complete. If the page can be read in from the hard disk cache, the price will be limited. However if it needs to physically read in the data from disk sectors this takes a lot of time. If an audio program hits a hard pagefault while it is playing it will almost certainly have audible consequences recognized as dropouts, clicks or pops.
Hard pagefaults are a very common but often overlooked cause of audio dropouts, clicks and pops. They especially occur often with audio software that uses a lot of memory such as samplers. Solutions for avoiding hard pagefaults are increasing the working set of the audio application, increasing the amount of RAM or disabling the pagefile altogether. Note that if you disable the pagefile, the system may run 'out of memory' because it does not have the pagefile available to swap memory to. Also the system will no longer create crash dump files in case of a system crash.

Latency Checker Windows 10

Latency Checker Dpc

Latency Checker Audio

Note: this content is currently being updated.