Our decoding code reads bytes in very small chunks. Which is not
efficient when dealing with the OS where the cost of a context switch is
significant. People could already buffer the data but it's easy to
forget it by accident.
This change requires the new `io::BufRead` trait instead of `io::Read`
in all bounds.
Code such as `Transaction::consensus_decode(&mut File::open(foo))` will
break after this is applied, uncovering the inefficiency.
This was originally Kix's work, done before we had the `io` crate.
Changes to `bitcoin` were originally his, any new mistakes are my own.
Changes to `io` are mine.
Co-developed-by: Martin Habovstiak <martin.habovstiak@gmail.com>
There is no advantage in having `io::Read` as opposed to `Read` and
importing the trait. It is surprising that we do so.
Remove `io::` path from `io::Read` and `io::Write`. Some docs keep the
path, leave them as is. Add import `use io::{Read, Write}`.
Refactor only, no logic changes.
We have a convention in `rust-bitcoin` to use external crates directly
when importing them not via `crate::foo`.
Update all the import paths for `io` to use this form.
Throughout the codebase we cast values to `u64` when constructing a
`VarInt`. We can make the code marginally cleaner by adding `From<T>`
impls for all unsigned integer types less than or equal to 64 bits.
Also allows us to (possibly unnecessarily) comment the cast in a single
place.
70fe07f1ce Export the DisplayHex trait from within prelude (Tobin C. Harding)
Pull request description:
We use `internals::hex::display::DisplayHex` in many places, we can improve ergonomics of the `internals` crate by re-exporting it from the `prelude` module.
ACKs for top commit:
Kixunil:
ACK 70fe07f1ce
apoelstra:
ACK 70fe07f1ce
Tree-SHA512: 96a89135cb0b829b7b5926a3b344f78e178b5b48e772a69da5133fab6d2e14e7b7bbaa56b7a417a5c1a64337546a1c7bac32307d3a1f27aa199ed61f590902bf
We use `internals::hex::display::DisplayHex` in many places, we can
improve ergonomics of the `internals` crate by re-exporting it from the
`prelude` module.
The `ToHex` trait was replaced by either simple `Display`/`LowerHex`
where appropriate or `DisplayHex` from `bitcoin_internals` which is
faster.
This change replaces the usages and removes the trait.
Tobin C. Harding
Andrew Poelstra
Matt Corallo
Vincenzo Palazzo
DanGould
Martin Habovstiak