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| </pre><pre class="rust"><code><span class="kw">use </span>std::io; |
| <span class="kw">use </span>std::io::Write; |
| |
| <span class="kw">use </span>common::{intersect_bitsets, BitSet, ReadOnlyBitSet}; |
| <span class="kw">use </span>ownedbytes::OwnedBytes; |
| |
| <span class="kw">use </span><span class="kw">crate</span>::space_usage::ByteCount; |
| <span class="kw">use </span><span class="kw">crate</span>::DocId; |
| |
| <span class="doccomment">/// Write an alive `BitSet` |
| /// |
| /// where `alive_bitset` is the set of alive `DocId`. |
| /// Warning: this function does not call terminate. The caller is in charge of |
| /// closing the writer properly. |
| </span><span class="kw">pub fn </span>write_alive_bitset<T: Write>(alive_bitset: <span class="kw-2">&</span>BitSet, writer: <span class="kw-2">&mut </span>T) -> io::Result<()> { |
| alive_bitset.serialize(writer)<span class="question-mark">?</span>; |
| <span class="prelude-val">Ok</span>(()) |
| } |
| |
| <span class="doccomment">/// Set of alive `DocId`s. |
| </span><span class="attribute">#[derive(Clone)] |
| </span><span class="kw">pub struct </span>AliveBitSet { |
| num_alive_docs: usize, |
| bitset: ReadOnlyBitSet, |
| } |
| |
| <span class="doccomment">/// Intersects two AliveBitSets in a new one. |
| /// The two bitsets need to have the same max_value. |
| </span><span class="kw">pub fn </span>intersect_alive_bitsets(left: AliveBitSet, right: AliveBitSet) -> AliveBitSet { |
| <span class="macro">assert_eq!</span>(left.bitset().max_value(), right.bitset().max_value()); |
| <span class="kw">let </span>bitset = intersect_bitsets(left.bitset(), right.bitset()); |
| <span class="kw">let </span>num_alive_docs = bitset.len(); |
| AliveBitSet { |
| num_alive_docs, |
| bitset, |
| } |
| } |
| |
| <span class="kw">impl </span>AliveBitSet { |
| <span class="attribute">#[cfg(test)] |
| </span><span class="kw">pub</span>(<span class="kw">crate</span>) <span class="kw">fn </span>for_test_from_deleted_docs(deleted_docs: <span class="kw-2">&</span>[DocId], max_doc: u32) -> AliveBitSet { |
| <span class="macro">assert!</span>(deleted_docs.iter().all(|<span class="kw-2">&</span>doc| doc < max_doc)); |
| <span class="kw">let </span><span class="kw-2">mut </span>bitset = BitSet::with_max_value_and_full(max_doc); |
| <span class="kw">for </span><span class="kw-2">&</span>doc <span class="kw">in </span>deleted_docs { |
| bitset.remove(doc); |
| } |
| <span class="kw">let </span><span class="kw-2">mut </span>alive_bitset_buffer = Vec::new(); |
| write_alive_bitset(<span class="kw-2">&</span>bitset, <span class="kw-2">&mut </span>alive_bitset_buffer).unwrap(); |
| <span class="kw">let </span>alive_bitset_bytes = OwnedBytes::new(alive_bitset_buffer); |
| <span class="self">Self</span>::open(alive_bitset_bytes) |
| } |
| |
| <span class="kw">pub</span>(<span class="kw">crate</span>) <span class="kw">fn </span>from_bitset(bitset: <span class="kw-2">&</span>BitSet) -> AliveBitSet { |
| <span class="kw">let </span>readonly_bitset = ReadOnlyBitSet::from(bitset); |
| AliveBitSet::from(readonly_bitset) |
| } |
| |
| <span class="doccomment">/// Opens an alive bitset given its file. |
| </span><span class="kw">pub fn </span>open(bytes: OwnedBytes) -> AliveBitSet { |
| <span class="kw">let </span>bitset = ReadOnlyBitSet::open(bytes); |
| AliveBitSet::from(bitset) |
| } |
| |
| <span class="doccomment">/// Returns true if the document is still "alive". In other words, if it has not been deleted. |
| </span><span class="attribute">#[inline] |
| </span><span class="kw">pub fn </span>is_alive(<span class="kw-2">&</span><span class="self">self</span>, doc: DocId) -> bool { |
| <span class="self">self</span>.bitset.contains(doc) |
| } |
| |
| <span class="doccomment">/// Returns true if the document has been marked as deleted. |
| </span><span class="attribute">#[inline] |
| </span><span class="kw">pub fn </span>is_deleted(<span class="kw-2">&</span><span class="self">self</span>, doc: DocId) -> bool { |
| !<span class="self">self</span>.is_alive(doc) |
| } |
| |
| <span class="doccomment">/// Iterate over the alive doc_ids. |
| </span><span class="attribute">#[inline] |
| </span><span class="kw">pub fn </span>iter_alive(<span class="kw-2">&</span><span class="self">self</span>) -> <span class="kw">impl </span>Iterator<Item = DocId> + <span class="lifetime">'_ </span>{ |
| <span class="self">self</span>.bitset.iter() |
| } |
| |
| <span class="doccomment">/// Get underlying bitset. |
| </span><span class="attribute">#[inline] |
| </span><span class="kw">pub fn </span>bitset(<span class="kw-2">&</span><span class="self">self</span>) -> <span class="kw-2">&</span>ReadOnlyBitSet { |
| <span class="kw-2">&</span><span class="self">self</span>.bitset |
| } |
| |
| <span class="doccomment">/// The number of alive documents. |
| </span><span class="kw">pub fn </span>num_alive_docs(<span class="kw-2">&</span><span class="self">self</span>) -> usize { |
| <span class="self">self</span>.num_alive_docs |
| } |
| |
| <span class="doccomment">/// Summarize total space usage of this bitset. |
| </span><span class="kw">pub fn </span>space_usage(<span class="kw-2">&</span><span class="self">self</span>) -> ByteCount { |
| <span class="self">self</span>.bitset().num_bytes() |
| } |
| } |
| |
| <span class="kw">impl </span>From<ReadOnlyBitSet> <span class="kw">for </span>AliveBitSet { |
| <span class="kw">fn </span>from(bitset: ReadOnlyBitSet) -> AliveBitSet { |
| <span class="kw">let </span>num_alive_docs = bitset.len(); |
| AliveBitSet { |
| num_alive_docs, |
| bitset, |
| } |
| } |
| } |
| |
| <span class="attribute">#[cfg(test)] |
| </span><span class="kw">mod </span>tests { |
| |
| <span class="kw">use </span><span class="kw">super</span>::AliveBitSet; |
| |
| <span class="attribute">#[test] |
| </span><span class="kw">fn </span>test_alive_bitset_empty() { |
| <span class="kw">let </span>alive_bitset = AliveBitSet::for_test_from_deleted_docs(<span class="kw-2">&</span>[], <span class="number">10</span>); |
| <span class="kw">for </span>doc <span class="kw">in </span><span class="number">0</span>..<span class="number">10 </span>{ |
| <span class="macro">assert_eq!</span>(alive_bitset.is_deleted(doc), !alive_bitset.is_alive(doc)); |
| <span class="macro">assert!</span>(!alive_bitset.is_deleted(doc)); |
| } |
| <span class="macro">assert_eq!</span>(alive_bitset.num_alive_docs(), <span class="number">10</span>); |
| } |
| |
| <span class="attribute">#[test] |
| </span><span class="kw">fn </span>test_alive_bitset() { |
| <span class="kw">let </span>alive_bitset = AliveBitSet::for_test_from_deleted_docs(<span class="kw-2">&</span>[<span class="number">1</span>, <span class="number">9</span>], <span class="number">10</span>); |
| <span class="macro">assert!</span>(alive_bitset.is_alive(<span class="number">0</span>)); |
| <span class="macro">assert!</span>(alive_bitset.is_deleted(<span class="number">1</span>)); |
| <span class="macro">assert!</span>(alive_bitset.is_alive(<span class="number">2</span>)); |
| <span class="macro">assert!</span>(alive_bitset.is_alive(<span class="number">3</span>)); |
| <span class="macro">assert!</span>(alive_bitset.is_alive(<span class="number">4</span>)); |
| <span class="macro">assert!</span>(alive_bitset.is_alive(<span class="number">5</span>)); |
| <span class="macro">assert!</span>(alive_bitset.is_alive(<span class="number">6</span>)); |
| <span class="macro">assert!</span>(alive_bitset.is_alive(<span class="number">6</span>)); |
| <span class="macro">assert!</span>(alive_bitset.is_alive(<span class="number">7</span>)); |
| <span class="macro">assert!</span>(alive_bitset.is_alive(<span class="number">8</span>)); |
| <span class="macro">assert!</span>(alive_bitset.is_deleted(<span class="number">9</span>)); |
| <span class="kw">for </span>doc <span class="kw">in </span><span class="number">0</span>..<span class="number">10 </span>{ |
| <span class="macro">assert_eq!</span>(alive_bitset.is_deleted(doc), !alive_bitset.is_alive(doc)); |
| } |
| <span class="macro">assert_eq!</span>(alive_bitset.num_alive_docs(), <span class="number">8</span>); |
| } |
| |
| <span class="attribute">#[test] |
| </span><span class="kw">fn </span>test_alive_bitset_iter_minimal() { |
| <span class="kw">let </span>alive_bitset = AliveBitSet::for_test_from_deleted_docs(<span class="kw-2">&</span>[<span class="number">7</span>], <span class="number">8</span>); |
| |
| <span class="kw">let </span>data: Vec<<span class="kw">_</span>> = alive_bitset.iter_alive().collect(); |
| <span class="macro">assert_eq!</span>(data, <span class="macro">vec!</span>[<span class="number">0</span>, <span class="number">1</span>, <span class="number">2</span>, <span class="number">3</span>, <span class="number">4</span>, <span class="number">5</span>, <span class="number">6</span>]); |
| } |
| |
| <span class="attribute">#[test] |
| </span><span class="kw">fn </span>test_alive_bitset_iter_small() { |
| <span class="kw">let </span>alive_bitset = AliveBitSet::for_test_from_deleted_docs(<span class="kw-2">&</span>[<span class="number">0</span>, <span class="number">2</span>, <span class="number">3</span>, <span class="number">6</span>], <span class="number">7</span>); |
| |
| <span class="kw">let </span>data: Vec<<span class="kw">_</span>> = alive_bitset.iter_alive().collect(); |
| <span class="macro">assert_eq!</span>(data, <span class="macro">vec!</span>[<span class="number">1</span>, <span class="number">4</span>, <span class="number">5</span>]); |
| } |
| <span class="attribute">#[test] |
| </span><span class="kw">fn </span>test_alive_bitset_iter() { |
| <span class="kw">let </span>alive_bitset = AliveBitSet::for_test_from_deleted_docs(<span class="kw-2">&</span>[<span class="number">0</span>, <span class="number">1</span>, <span class="number">1000</span>], <span class="number">1001</span>); |
| |
| <span class="kw">let </span>data: Vec<<span class="kw">_</span>> = alive_bitset.iter_alive().collect(); |
| <span class="macro">assert_eq!</span>(data, (<span class="number">2</span>..=<span class="number">999</span>).collect::<Vec<<span class="kw">_</span>>>()); |
| } |
| } |
| |
| <span class="attribute">#[cfg(all(test, feature = <span class="string">"unstable"</span>))] |
| </span><span class="kw">mod </span>bench { |
| |
| <span class="kw">use </span>rand::prelude::IteratorRandom; |
| <span class="kw">use </span>rand::thread_rng; |
| <span class="kw">use </span>test::Bencher; |
| |
| <span class="kw">use </span><span class="kw">super</span>::AliveBitSet; |
| |
| <span class="kw">fn </span>get_alive() -> Vec<u32> { |
| <span class="kw">let </span><span class="kw-2">mut </span>data = (<span class="number">0</span>..<span class="number">1_000_000_u32</span>).collect::<Vec<u32>>(); |
| <span class="kw">for _ in </span><span class="number">0</span>..(<span class="number">1_000_000</span>) * <span class="number">1 </span>/ <span class="number">8 </span>{ |
| remove_rand(<span class="kw-2">&mut </span>data); |
| } |
| data |
| } |
| |
| <span class="kw">fn </span>remove_rand(raw: <span class="kw-2">&mut </span>Vec<u32>) { |
| <span class="kw">let </span>i = (<span class="number">0</span>..raw.len()).choose(<span class="kw-2">&mut </span>thread_rng()).unwrap(); |
| raw.remove(i); |
| } |
| |
| <span class="attribute">#[bench] |
| </span><span class="kw">fn </span>bench_alive_bitset_iter_deser_on_fly(bench: <span class="kw-2">&mut </span>Bencher) { |
| <span class="kw">let </span>alive_bitset = AliveBitSet::for_test_from_deleted_docs(<span class="kw-2">&</span>[<span class="number">0</span>, <span class="number">1</span>, <span class="number">1000</span>, <span class="number">10000</span>], <span class="number">1_000_000</span>); |
| |
| bench.iter(|| alive_bitset.iter_alive().collect::<Vec<<span class="kw">_</span>>>()); |
| } |
| |
| <span class="attribute">#[bench] |
| </span><span class="kw">fn </span>bench_alive_bitset_access(bench: <span class="kw-2">&mut </span>Bencher) { |
| <span class="kw">let </span>alive_bitset = AliveBitSet::for_test_from_deleted_docs(<span class="kw-2">&</span>[<span class="number">0</span>, <span class="number">1</span>, <span class="number">1000</span>, <span class="number">10000</span>], <span class="number">1_000_000</span>); |
| |
| bench.iter(|| { |
| (<span class="number">0</span>..<span class="number">1_000_000_u32</span>) |
| .filter(|doc| alive_bitset.is_alive(<span class="kw-2">*</span>doc)) |
| .collect::<Vec<<span class="kw">_</span>>>() |
| }); |
| } |
| |
| <span class="attribute">#[bench] |
| </span><span class="kw">fn </span>bench_alive_bitset_iter_deser_on_fly_1_8_alive(bench: <span class="kw-2">&mut </span>Bencher) { |
| <span class="kw">let </span>alive_bitset = AliveBitSet::for_test_from_deleted_docs(<span class="kw-2">&</span>get_alive(), <span class="number">1_000_000</span>); |
| |
| bench.iter(|| alive_bitset.iter_alive().collect::<Vec<<span class="kw">_</span>>>()); |
| } |
| |
| <span class="attribute">#[bench] |
| </span><span class="kw">fn </span>bench_alive_bitset_access_1_8_alive(bench: <span class="kw-2">&mut </span>Bencher) { |
| <span class="kw">let </span>alive_bitset = AliveBitSet::for_test_from_deleted_docs(<span class="kw-2">&</span>get_alive(), <span class="number">1_000_000</span>); |
| |
| bench.iter(|| { |
| (<span class="number">0</span>..<span class="number">1_000_000_u32</span>) |
| .filter(|doc| alive_bitset.is_alive(<span class="kw-2">*</span>doc)) |
| .collect::<Vec<<span class="kw">_</span>>>() |
| }); |
| } |
| } |
| </code></pre></div> |
| </section></div></main><div id="rustdoc-vars" data-root-path="../../../" data-current-crate="tantivy" data-themes="ayu,dark,light" data-resource-suffix="" data-rustdoc-version="1.66.0-nightly (5c8bff74b 2022-10-21)" ></div></body></html> |
