--- format: "aidr-story-markdown/v1" id: "a46d65a52e3a4c8cfe208f784bf231a12be0f0eec3a57a5db6ca9ea6a8ebea5f" canonical_url: "https://aidr.today/a46d65a5?lang=en" title: "Perplexity Introduces Photon: A Rust-Based Retrieval Engine That Cuts p99 Latency From 800 ms to 65 ms" lang: "en" requested_lang: "en" available_langs: ["en","vi"] translation_fallback: null fallback_fields: [] published_at: "2026-09-30T08:26:52.000Z" category: "Infra" topics: ["coding"] source_urls: ["https://www.marktechpost.com/2026/09/30/perplexity-introduces-photon-a-rust-based-retrieval-engine-that-cuts-p99-latency-from-800-ms-to-65-ms/"] summary: "Perplexity has released Photon, an in-house retrieval and ranking engine written in Rust. It replaces an open-source engine Perplexity had forked for its AI-native search stack. Photon now handles retrieval and ranking for all production traffic. It also powers a new Fast Search mode in the Perplexity Search API. Perplexity reports single-call latency of 160 […] The post Perplexity Introduces Photon: A Rust-Based Retrieval Engine That Cuts p99 Latency From 800 ms to 65 ms appeared first on MarkTechPost ." --- # Perplexity Introduces Photon: A Rust\-Based Retrieval Engine That Cuts p99 Latency From 800 ms to 65 ms > [Open the canonical story]() **Published:** 2026-09-30T08:26:52.000Z **Category:** Infra **Topics:** coding ## Summary Perplexity has released Photon, an in\-house retrieval and ranking engine written in Rust\. It replaces an open\-source engine Perplexity had forked for its AI\-native search stack\. Photon now handles retrieval and ranking for all production traffic\. It also powers a new Fast Search mode in the Perplexity Search API\. Perplexity reports single\-call latency of 160 \[…\] The post Perplexity Introduces Photon: A Rust\-Based Retrieval Engine That Cuts p99 Latency From 800 ms to 65 ms appeared first on MarkTechPost \. ## Sources - [Story source]()