Hepsiburada Case Study | Loadium

Loadium — Hepsiburada Case Study

Hepsiburada is Turkey’s largest e-commerce platform. Before Black Friday, a central load testing platform was needed.

Loadium — Hepsiburada Case Study

General Outlook

Hepsiburada is Turkey’s largest e-commerce platform. Hepsiburada works with about 190 engineers and consists of 19 product teams. Each month, over 100 million visits take place. Additionally, Hepsiburada receives orders between 35 thousand and 40 thousand, daily. The company took 350 thousand orders only for the last Black Friday campaign period.


Before Black Friday, a central load testing platform was needed. All test scenarios needed to be brought together to create a real Black Friday simulation test. In order to facilitate account management and test management, project control was required. Since the test runs took place in a lively environment, the requirements were as the following:

  • Measuring service times under normal conditions
  • Determining the breakdown of environment and tools over a period of time with an increasing number of loads
  • Determining the specific limits of each team and enabling them to take network actions by sending them more load than they can handle.
“There’s no begin time for getting ready for Black Friday. We have been preparing 365 days straight only for this one specific day.” — Alper Hankendi, Software Development Manager at Hepsiburada


Due to the work done, once all teams had their own tests up and running, an average of 200–300 engines and 40-60 thousand thread users were removed from each separate account of each team on Loadium. During the Black Friday preparation process, the software team at Hepsiburada had the chance to observe their limits, including 100 engine 800 threads (80 thousand threads) and 130 engine 800 threads (104 thousand threads). During testing of these limits, Loadium product was used and a successful and trouble-free test experience took place. JMeter 5.0 and Gatling compatibility were then applied to be activated for any future load test needs if required. Previously, all teams could never perform the load test when each product worked with each other but because of Loadium, all teams’ load tests were gathered in a single central location and a load test could be carried out on such a scale that could simulate a true Black Friday day across Hepsiburada in general. While the need for hardware for a simulation on the scale of a very serious load such as Black Friday would normally cause a very high cost, these costs were prevented by the user simulation offered by the Loadium platform over the cloud.

“By collecting all teams’ load tests in one central location, we have been able to do a load test in such a scale that can simulate one true fit for Black Friday across Hepsiburada.” — Alper Hankendi


Loadium enabled the Hepsiburada.com team to see possible errors that they could not normally see during the BlackFriday preparation period. Significant improvements have been made and actions have been taken especially on the network and system side under the intensive load that was sent. For example, both teams’ servers being on the same host was posing a risk. While working without any problems at normal levels of load, it could give errors while working under heavy loads, once a team’s throughput is increased, it would consume the entire process speed of the server to which it was connected and leave no machine to the other team’s server to be fed. Black Friday simulation has been created by turning all tests into a single test with end-to-end logic and thus provided the surfacing of such problems and their solutions. Throughput, response times, and visual graphs on the platform offered by Loadium provided important information to the team. For example, with the help of this visualization, it could be told if there was a problem with installation because of the network or whether there was an issue that occurred at pre-installation. Thanks to the reports and graphs presented by Loadium, Hepsiburada was able to obtain insights that would be very useful in defining strategies within the scope of the test.

“Load testing was not included in software development processes in our lives. After integrating Loadium into our lives, load test has become a part of the software development process. It is now in our teams’ DNAs.” — Alper Hankendi