Research factors that influence Gateway TTFB

[iand]

Research factors that that can be used to form testable hypotheses. These can then become candidate projects to improve performance.

[JesseXie]

what is the findings?

[iand]

They are included in the work plan. Draft is internal to PL at the moment but will be made public when approved (see here)

[iand]

Based on this analysis of the GET request flow in go-ipfs the primary factors influencing gateway TTFB are:

• the number of intermediate nodes that must be read to locate the cid of the requested path
• whether any required block is present in the local blockstore
• the response time of the local blockstore to locate and read blocks
• the time spent locating the provider of a block using the dht
• the time spent connecting to and reading from a block provider
• the time spent enumerating the contents of a directory if a directory listing needs to be served
• the time taken to validate the existence of the requested block (cache validation/etag check)