# Revision history for streaming-concurrency
## 0.3.1.0 -- 2018-03-14
* Allow `streaming-0.2.*`
* Improved performance for `withStreamMap` and `withStreamMapM`.
- Previously used additional `Stream`s within the concurrent
buffers which isn't actually needed.
- A benchmark is available to compare various implementations.
* Primitives to help defining custom stream-mapping functions are now
exported.
## 0.3.0.1 -- 2017-07-07
* Allow `streaming-with-0.2.*`
## 0.3.0.0 -- 2017-07-05
* Removed support for streaming `ByteString`s.
The ByteString-related functions which were previously implemented
are broken conceptually and should not be used.
A ByteString consists of a stream of bytes; the meaning of each byte
is dependent upon its position in the overall stream.
In terms of implementation, these bytes are accumulated into
_chunks_, each of which may very well be of a different size.
As such, if such a chunk is fed into a buffer with multiple readers,
then there is no guarantee which reader will actually receive it or if
it makes sense about what it is in isolation (e.g. it could be split
mid-word, or possibly even in the middle of a Unicode character).
If, however, multiple ByteStrings are fed into a buffer with a single
reader, the order it has when coming out is similarly undeterministic:
it isn't possible to coherently ensure the sanity of the resulting
ByteString.
As such, unless you really want to consider it as a stream of
raw 8-bit numbers, trying to do any concurrency with a ByteString
will only lead to trouble. If you do need such functionality, you
can implement it yourself using buffers containing `Word8` values
(in which case you can use `Data.ByteString.Streaming.unpack`).
* Fix lower bound of `lifted-async` (`replicateConcurrently_` was
added in 0.9.3).
## 0.2.0.0 -- 2017-07-05
* Rename functions to match the `with...` naming scheme:
- `merge{Streams,ByteStrings}` to `withMerged{Streams,ByteStrings}`
- `read{Stream,ByteString}Basket` to `with{Stream,ByteString}Basket`
* Add the ability to use buffers to concurrently transform the stream;
following functions added:
- `withBufferedTransform`
- `withStreamMap`
- `withStreamMapM`
- `withStreamTransform`
(Note: it is not sound in the general case to transform a
streaming `ByteString`; as such, functions for this are not
implemented though it is possible to do yourself.)
## 0.1.0.0 -- 2017-07-04
* First version.