Dave Collins 27c0f9f8d1 wire: Add large tx deserialize benchmark. (#678) ...

This adds a benchmark for deserializing a large transaction that is
often referred to as the megatransaction since it is the largest Bitcoin
transaction mined to date.  It consists of 5569 inputs and 1 output and
its hash is:

bb41a757f405890fb0f5856228e23b715702d714d59bf2b1feb70d8b2b4e3e08.

This is being done so there is a benchmark that tests more of a
worst-case scenario which is a better candidate for identifying and
testing improvements.

The following benchmark results shows the how much more intensive this
transaction is over the existing mock transaction:

DeserializeTxSmall  1000000    1751 ns/op      376 B/op     16 allocs/op
DeserializeTxLarge  300     5093980 ns/op  1672829 B/op  33430 allocs/op

2016-04-25 16:51:27 -05:00

530 KiB

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