Latency is a measure of how long it takes for data to be sent from one point to another. It can vary widely, depending on the size of the request. For instance, a single asset may have very little latency, but websites generally involve multiple requests, including multiple CSS files, scripts, and media files. As the number of requests grows, the latency increases. A low-latency connection will return the requested resources almost immediately, while a high-latency connection will take much longer to return the same resources.
Network Latency
Understanding what is latency is important when you’re using a network. Network latency occurs when information takes a long time to reach its destination. This can be due to multiple factors. One of the most common causes is distance. The distance between a client device and a server is the major cause of latency. For example, if a client device in Madison, Wisconsin wants to visit a website hosted in Chicago, Illinois, the request will take around 40-50 milliseconds to travel.
In addition to geographic location, network latency is also affected by the type of transmission media used. For example, a T1 line will have less latency than a Cat5 cable.
Throughput
Understanding what is latency and throughput is a critical component of system design. Throughput is the amount of work that can be done in a specified period of time. While they are often considered the opposite of each other, the terms are closely related. Latency is the amount of time it takes for the first byte to arrive while throughput is the number of transactions that can be processed within a specific period of time.
In network design, latency is a measure of how long it takes for a packet to travel from its source to its destination. Throughput is the number of packets that can be processed in a certain period of time. Generally, latency and throughput have a direct relationship. For example, the maximum bandwidth of a network specifies how many conversations can be conducted in a given period of time.
Bandwidth
Bandwidth and latency are both important factors in the performance of the Internet. Latency is the delay in the transmission of data, and it can make it seem as if a web page is taking forever to load. Latency is often measured in milliseconds. It can be caused by many factors, including slow servers, excessive network hopping, and inefficient data packing. Excessive latency can make a network appear slow and may cause users to complain about the lag.
Bandwidth is the amount of data that can be transferred over a network, while latency is the time it takes for the data to travel the pipe. A larger bandwidth can mean faster data transmission, but a low bandwidth will mean a higher latency.
Distance
There are a variety of factors that can affect network latency. For example, the distance between two servers can increase the latency. Similarly, the hops required by a packet to travel from one site to another can affect the latency. Generally, a higher number of hops means a longer time to reach its destination. Latency can also be caused by congestion of the network.
Latency is the average time that a data packet travels from one source to another. It also factors into the throughput, which is the total number of packets that are processed in a given period. Consequently, a high latency can negatively impact the UX of a web page or mobile application.
Acceptable Latency
Acceptable latency is a range of latency in network applications. The range varies for different types of applications, including video and VoIP calls. For example, VoIP calls require a lower latency range than email, while video requires more bandwidth. Network administrators need to take all of these factors into consideration before setting an acceptable latency range for their network.
Acceptable latency is often defined as below 150 milliseconds. This means those website elements should load in less than 3 seconds. While this might not seem like a lot of time for a few kb of data, it’s important to remember that even the smallest delay will affect the overall performance of your website. If latency is more than 150 ms, it will negatively impact the overall performance of your website.
