Add D1 changelog and release notes for request latency improvements

Author: vy-ton

src/content/changelogs-next/2025-01-07-d1-faster-query.mdx

@@ -0,0 +1,15 @@
+---
+title: 40-60% Faster D1 Requests
+description: D1 end-to-end request latency decreases by 40-60%.
+products:
+  - d1
+date: 2025-01-07T18:00:00Z
+---
+ 
+[D1](/d1/) lowered end-to-end request latency by 40-60% by eliminating latency incurred with multiple network round trips required for each request. Faster D1 performance applies to requests via both D1's [Worker API](/d1/worker-api/) and [REST API](/api/resources/d1/subresources/database/methods/query/).
+
+Removing netowrk round trips particularily benefit user requests geographically far from the requested D1 database, e.g, user in Europe talking to a database in North America. D1 [location hints](https://developers.cloudflare.com/d1/configuration/data-location/#provide-a-location-hint) can be used to influence the geographic location of a database.
+
+[TODO image]
+
+For more details on how D1 lowered latency, see product-specific changelog [entry](/d1/platform/changelog/#2025-01-13).

src/content/changelogs/d1.yaml

@@ -16,6 +16,16 @@ entries:
 
       For better insight into your current usage, refer to your [billing metrics](/d1/observability/billing/) for rows read and rows written, which can be found on the [D1 dashboard](https://dash.cloudflare.com/?account=/workers/d1) or GraphQL API.
 
+  - publish_date: "2024-01-07"
+    title: D1 end-to-end request latency decreases by 40-60%.
+    description: |-
+
+    D1 lowered end-to-end request latency by 40-60% by eliminating latency incurred with multiple network round trips required for each request. Faster D1 performance applies to requests via both D1's [Worker API](/d1/worker-api/) and [REST API](/api/resources/d1/subresources/database/methods/query/). 
+
+    For each request, two to three network round trips were eliminated. One round trip was introduced by a bug that was fixed. 
+    
+    The remaining removed round trips were responsible for creating TCP connections between Cloudflare data centers. D1's networking layer no longer relies on TCP connections, which removes additional round trip time.
+
   - publish_date: "2024-08-23"
     title: D1 alpha databases have stopped accepting SQL queries
     description: |-