The Statsig JavaScript SDK is designed to be as lightweight as possible while supporting as many browsers as possible. The primary feature that our SDK relies on, which may not be supported by all browsers, is a JavaScript Promise. You may wish to polyfill a Promise library to ensure maximum browser compatibility. We recommend taylorhakes/promise-polyfill for its small size and compatibility.
Please note that the SDK has not been tested on Internet Explorer. Microsoft is retiring IE11 in June 2022. For more detailed information, you can refer to the Statsig JavaScript Client SDK documentation.
For more specific compatibility details, you can refer to the Statsig Compatibility page. This page provides detailed information about the compatibility of Statsig with different versions of browsers like Chrome.
As for latency information, unfortunately, this conversation does not provide any details. Please refer to the official Statsig documentation or support for more information.