Time-to-first-byte and Beyond
Blog post from Rime
The concept of "time to first byte" (TTFB) is often used to measure server responsiveness, but its definition can vary depending on the context, particularly in text-to-speech (TTS) applications where it may refer to the time between receiving a request and sending the first byte of audio. An alternative metric, "first contentful paint" (FCP), measures the time until the first piece of content is rendered in a browser, offering a more tangible measure for users. For TTS services like Rime, measuring the time to the first byte of audio rather than the first byte of a header may be more relevant. A study involving various TTS vendors, including Rime and Deepgram, evaluated the speed of audio response, with Deepgram noted for its quick performance. Rime is focused on maintaining high-quality voice output while exploring ways to reduce latency through features like websocket support, aiming to be the fastest high-quality TTS provider.
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