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# RcppHNSW 0.3.0
## New features
* Multi-threading support is now available. Use the `setNumThreads` method if
using the object-based API, and the `n_threads` parameter in the `hnsw_*`
function API. For finer control, a `setGrainSize` and `grain_size` option is
also available in the object and function interface respectively. Thank you
to [Dmitriy Selivanov](https://github.com/dselivanov) for a lot of the work on
this.
* Updated hnswlib to
[version 0.4.0](https://github.com/nmslib/hnswlib/releases/tag/v0.4.0).
## Bug fixes and minor improvements
* Setting `verbose = TRUE` now has incurs substantially less computational
overhead associated with calculating the progress bar. Thank you to
[Samuel Granjeaud](https://github.com/SamGG) for spotting the problem and coming
up with various solutions.
* New parameter: `progress`. By default this is set to `"bar"` and will show the
progress bar when `verbose = TRUE`. If you want a more terse output, set
`progress = NULL`. `progress = NULL` will eventually be the default setting:
for now, `verbose = TRUE` will get you the progress bar by default for backwards
compatibility.
* No progress bar will be shown if you have less than 50 items to process.
# RcppHNSW 0.2.0
## New features
* Updated hnswlib to <https://github.com/nmslib/hnswlib/commit/c5c38f0>
(20 September 2019).
* A new method, `markDeleted`, that will remove an object from being retrieved
from the index.
* A new method, `resizeIndex`, that allows the index to be increased without
having to save and reload the index.
* A new method, `size` is available for the index objects and reports the
number of items added to the index.
## Bug fixes and minor improvements
* `hnsw_search` would `stop` if the number of rows in the input matrix was
smaller than `k`. This check has been removed. Note that the correct behavior is
to ensure that `k` is smaller than or equal to `index$size()` where `index` is
the index you are searching. Because the `size()` method is new to this version,
to preserve compatibility with old indexes, this check *hasn't* been added to
`hnsw_search`. If this matters to you, manually compare `index$size()` with `k`
before running `hnsw_search`. An error will be thrown if `k` neighbors can't be
found in the index. Thank you to [Yuxing Liao](https://github.com/yxngl) for
spotting this and the pull request to remove the check.
# RcppHNSW 0.1.0
Initial release.
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