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• A binary type system that maps FIX datatypes to native platform types, avoiding unnecessary and costly translation between character-based encodings and types directly usable by computers.
• Deterministic and narrowly targeted message layouts enforced by templates. They enable each use case of an overloaded FIX message type such as ExecutionReport to have its own layout.
• Each template contains just the required fields for its use case, such as immediate execution. The benefit is reduced message size and reduced optionality. In hardware terms, the result is reduced network bandwidth, reduced memory usage, reduction of cache misses, and less code branching in CPUs. All add up to deterministic performance and low latency. (In fact,
  “mechanical  “mechanical sympathy” enables hardware-based or accelerated solutions.)
• Just data on the wire. Metadata is exchanged out-of-band as a message schema. This enables pre-processing such as code generation of encoders and decoders rather on-the-fly interpretation.
• An explicit versioning mechanism that allows extension of templates over time without breaking older decoders.

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