[beh9540]

I can second this - our mainframes average response time is 2-5 seconds based on the call, with 99 percentile responses in the minutes per transaction. This is after a fortune was spent moving us to a "faster" platform.

Also, at our bank, very few applications use the REST API. Since most applications are developed by contractors, most vendors don't want to use our custom API, and instead opt to connect to the mainframe directly, because then they can reuse the code at other banks after charging us to develop it.

[dralley]

Isn't this confusing latency with throughput? Mainframes are designed for throughput, raw TXNs per second, and a lot of the architecture is designed around batching. Which is great for throughput, but the antithesis of latency.