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Load zones
Define geographic zones for distributed load tests.
Use load zones and regions to direct virtual users to specific geographies and better simulate real-world traffic patterns.
Depending on your preferred method, select any one of the following to set load zones:
Set Regions
- Select load zones: Choose the regions where your tests will run. For each load zone, set the percentage of total load to be distributed. The dashboard visualizes the split with a chart for easy reference.

Set Regions
- Use the
loadzonesub-config to specify each region. For each region, set the traffic percentage using thepercentsub-config. - Make sure that the total percentage equals 100.
| Continent | Region |
loadzone config value to be passed |
|---|---|---|
| North America | US East (Virginia) | us-east-1 |
| North America | US West (North California) | us-west-1 |
| Asia | Asia Pacific (Mumbai) | ap-south-1 |
| Europe | EU West (London) | eu-west-2 |
| Europe | EU Central (Frankfurt) | eu-central-1 |
browserstack-load.yml
regions:
- loadzone: us-east-1
percent: 50
- loadzone: us-west-1
percent: 50
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