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Does anyone have more details on what the "embedded string" object encoding is and what workloads it helps with? The closest thing I can find is https://github.

• antirez 12y ago
  Hey, it's very straightforward. Normally you have something like the redis object structure which has a type field, and a pointer to the actual representation of the object. If type is REDIS_STRING, you have the pointer to an "sds" string (where sds is the name of the string library used). Now with embedded strings there is a special kind of string objects that instead use a single allocation for both the object structure and the string itself. This is slightly more memory efficient, but especially, improves memory locality a lot, so basically everything uses string objects (string types, or aggregate data types large enough to use string objects as values of the collection), will perform better. Those special strings are used only for small strings (the majority in most work loads).