7 Performance Testing Tools To Stress Test Your Website

load testing tools to consider
load testing tools to consider

Even primarily essentially the most novice amongst web page householders has in some unspecified time sooner or later or completely different examined their web page effectivity. However, most of these assessments often cope with loading velocity or individual experience indices.

But what about load testing?

Although most internet sites are inclined to web site guests ranges that are usually pretty frequent, there is also occasions when some web sites can have to deal with heavy lots. Examples of these embrace on-line outlets, and even some authorities internet sites.

If your web page will get an sudden spike throughout the number of visitors over a short interval, how correctly are you geared as much as cope with it?

Understanding Load Testing

What is load testing?

Load testing is bench-marking a web page to see the way in which it performs beneath quite a few lots.

For occasion, a examine would possibly simulate an rising number of concurrent visitors landing in your web site. It might also file how your web site handles them and information them to your reference.

Example of load tests
Example – load assessments at LoadStorm: Metrics measured embrace frequent response time, peak response time, and error payment (image source).

What types of “load” are examined?

Depending on the software program you choose to load examine your web site with, each would possibly embrace utterly completely different choices. The most simple will merely include simulating an ever rising load and halting when your web site crashes.

Other devices might additionally be capable of producing a simulated load that mimics utterly completely different individual behaviour, equivalent to performing queries, altering pages, or loading completely different capabilities. Some would possibly even discover a solution to map out logical flows for each explicit individual state of affairs.

Load Testing Tools to Consider

Depending on their complexity, some load testing devices might be pretty expensive. However, there are cheaper selections on the market and some are even free for use. I’ve included a mixture of these underneath to your reference, along with just a few open provide selections.

1. Loadview by Dotcom Monitor


Website: https://www.loadview-testing.com/

Price: From $199/mo, free trial obtainable

Loadview is probably going one of many additional full choices obtainable on the market and presently depends on a cloud service model. This signifies that irrespective of kind of simulation you need from them, you solely pay for the service – there could also be zero funding in {{hardware}} or the remaining.

Feature good, Loadview affords a very superior decision which will embrace one thing from straight up HTTP load tests to an aesthetic combination of your choice. It is able to simulate dynamic variables and even geo-location selection in its assessments.


  • Post-firewall assessments
  • Handles dynamic variables
  • Detailed waterfall charts
  • Load examine curves

2. K6 Cloud (beforehand Load Impact)

Website: https://k6.io/

Price: From $59/mo

K6 is a cloud-based, open provide load testing software program that’s supplied as a service. One of the problems that makes this software program attention-grabbing is that it’s priced on a variable-use model which signifies that the worth of entry might be comparatively low relying in your desires. It is, nonetheless, primarily developer-centric.

Aside from load testing, K6 moreover affords effectivity monitoring. Its load testing side is targeting extreme lots and will cope with quite a few modes equivalent to spikes, stress testing, and endurance runs.

*K6 doesn’t run in browsers nor does it run in NodeJS


  • Developer-friendly APIs.
  • Scripting in JavaScript
  • Performance monitoring

3. Load Ninja


Website: https://loadninja.com/

Price: From $119.92/mo

Load Ninja means that you can load-test with precise browsers based mostly totally on recorded scripts after which helps analyze effectivity outcomes. Its use of precise browsers at scale signifies that this software program helps recreate a additional lifelike ambiance and end consequence for testing.

Results might be analyzed in real-time and because of the useful devices the system affords, your scripting time might be decreased by as loads as 60%. Internal capabilities might be examined as correctly, every with proxy-based mounted IPs or your private fluctuate of dynamic IPs (by using a whitelister).


  • Test with 1000’s of precise browsers
  • Diagnose assessments in real-time
  • Insights on interior software program effectivity

4. LoadRunner by Micro Focus


Website: https://www.microfocus.com/

Price: From $0

With an entry-level free neighborhood account that helps assessments from 50 digital prospects, LoadRunner is in the marketplace even to the latest web page householders. However, within the occasion you scale it as much as extreme ranges the related payment rises exponentially.

This Cloud-based service moreover affords the utilization of an Integrated Development Environment for unit assessments. It helps a wide range of software program environments along with Web, Mobile, WebSockets, Citrix, Java, .NET, and quite extra. Be aware that LoadRUnner might be pretty superior and has a steep finding out curve.


  • Patented auto-correlation engine
  • Supports 50+ utilized sciences and software program environments
  • Reproduces precise enterprise processes with scripts

5. Loader

Website: https://loader.io/

Price: From $0

Compared to what we’ve confirmed up to now, Loader is a loads simpler and further basic software program. Its free plan helps load testing with as much as 10,000 digital prospects which is adequate for a lot of cheap web site guests internet sites. 

Unfortunately you’ll want to have a paid plan to entry additional superior choices equivalent to  superior analytics, concurrent assessments, and priority assist. It is easy to make use of though since principally you merely add your web site, specify the parameters, then let the examine run.


  • Shareable graphs & stats
  • Useable in a GUI or API format
  • Supports DNS Verification and priority loaders

6. Gatling

Website: https://gatling.io/

Price: From $0

Gatling is offered in two flavors, Open Source or Enterprise. The former means that you can load-test as an integration together with your private enchancment pipeline. It accommodates every an internet recorder and report generator with the plan. The Enterprise mannequin has on-premise deployments or alternatively, you presumably can go for a Cloud mannequin based mostly totally on Amazon Web Services (AWS)

Although every of these variations are feature-packed, the Enterprise mannequin helps just some extras that don’t embrace Open Source. For occasion, it has a additional usable administration interface and helps a wider fluctuate of integrations.


  • Multi-protocol scripting
  • Unlimited testing and throughput
  • Gatling scripting DSL

7. The Grinder

Website: https://sourceforge.net/projects/grinder/

Price: From $0

Grinder is open sourced all the way in which wherein and may be the one truly free alternative on this itemizing. However, it needs to be run domestically in your private enchancment ambiance and desires just some additional equivalent to Java in order to work. 

However, being open provide it has been adopted broadly and builders have offer you a plentiful number of plugins which vastly lengthen it in relation to every use-ability and efficiency. Still, besides you’re a developer or so oriented, The Grinder might be a bit of little bit of a handful so that you can use.


  • Flexible scripting based mostly totally on Jython and Clojure
  • Highly modular with tons of plugins
  • Distributed framework and mature HTTP assist

When to Load Test Your Website Performance?

If you’ve had a check out lots of the devices obtainable, you’ll possibly have seen that a number of them provide each trial accounts or some sort of restricted free mannequin. This makes them obtainable for use for a big viewers.

Most web page householders need to be concerned about hosting performance as a result of it impacts approach over simply user experience. For many enterprise householders, the supply of your web page generally is a matter of name identify recognition.

Sites which are rising need to be notably cautious of availability and scalability of the sources used to internet hosting your web page. In most situations a extreme share of individual response time is spent on the ground of your web site. However, as web sites develop in web site guests amount this will change.

More web site guests usually means a disproportionate progress in backend processing and your system will wrestle as that spikes. Much will rely on variables distinctive to your web site enchancment, so it isn’t potential to offer you a robust number of visitors at which degree it should happen.

To realistically see how your web site effectivity you need load testing to be achieved. Exactly when to do it’s debatable, nonetheless my suggestion might be to plan ahead and examine early. 

What to Check for When Load Testing?

As the very title implies, your core function should be the elemental of how your web site performs beneath lots. This will assist you to observe varied points equivalent to:

  1. At what degree your web site effectivity begins to degrade
  2. What actually happens when service degrades

When I mentioned how utterly completely different web sites would possibly react in one other approach based mostly totally on their construction, that was an indication meant so that you can understand that not all web sites fail within the similar means as correctly. Some database-intensive web sites might fail on that point, whereas others would possibly endure IO failures based mostly totally on server connection lots.

Because of this, you need to be prepared to rearrange numerous assessments to understand how your web site and server will cope beneath quite a few eventualities. Based on these, protect an in depth eye on just some key metrics equivalent to your server response time, the number of errors cropping up, and what areas these faults would possibly lie in.

Generating superior scripts and runs along with the accompanying logic might be troublesome. I counsel that you just methodology load testing incrementally. Start with a brute strain examine that may merely examine your web site beneath a repeatedly rising stream of web site guests.

As you obtain experience, add on completely different components equivalent to variable behaviour, rising your scripts and logic over time.

Conclusion: Some is Better than None

When it involves load testing, starting with the basics is more healthy than not getting started the least bit. If you’re a beginner to all of this, do try and do your testing on an alternate mirror or offline the place potential – steer clear of load testing a dwell web site within the occasion you’ll be able to!

If you’re merely starting out now, remember to create a file of your assessments. Performance testing is a journey that should accompany the occasion of your web site as a result of it grows. The course of might be tiring nonetheless keep in mind, not having a file might make future assessments quite extra troublesome for you.

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