tanyafitness.co Email Addresses and Contacts - KazanSEO
Summary
Based on the given text, it is difficult to determine the exact topic or purpose of the website. However, some relevant information can be inferred.
The website appears to incorporate functions related to performance measurement and timing in a window/browser environment. It mentions terms like "performance," "performancemark," "performancemeasure," and "nowoffset." This suggests that the site may provide tools or resources for analyzing and optimizing website performance.
Additionally, there are references to various libraries, functions, and polyfills related to browser compatibility and handling errors.
Overall, without more context or complete information from the original website content, it is challenging to summarize precisely what the site is about.