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Optimize SentenceExtractor.

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Remove String pool because it's not doing much.
Break out constant.
Use a shared RdrPosTagger.
This commit is contained in:
Viktor Lofgren 2023-06-12 17:42:31 +02:00 committed by Viktor
parent ffcbc6c1c9
commit 77f2ca51af
1 changed files with 18 additions and 22 deletions
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40
code/libraries/language-processing/src/main/java/nu/marginalia/language/sentence/SentenceExtractor.java
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@ -4,7 +4,6 @@ import com.github.datquocnguyen.RDRPOSTagger;
import gnu.trove.map.hash.TObjectIntHashMap;
import lombok.SneakyThrows;
import nu.marginalia.LanguageModels;
import nu.marginalia.util.StringPool;
import nu.marginalia.language.model.DocumentLanguageData;
import nu.marginalia.language.model.DocumentSentence;
import opennlp.tools.sentdetect.SentenceDetectorME;
@ -22,12 +21,11 @@ import java.io.FileInputStream;
import java.io.IOException;
import java.io.InputStream;
import java.util.*;
import java.util.regex.Pattern;
public class SentenceExtractor {
private SentenceDetectorME sentenceDetector;
private final RDRPOSTagger rdrposTagger;
private static RDRPOSTagger rdrposTagger;
private final PorterStemmer porterStemmer = new PorterStemmer();
private static final Logger logger = LoggerFactory.getLogger(SentenceExtractor.class);
@ -35,8 +33,10 @@ public class SentenceExtractor {
private static final SentenceExtractorHtmlTagCleaner tagCleaner = new SentenceExtractorHtmlTagCleaner();
private static final SentencePreCleaner sentencePrecleaner = new SentencePreCleaner();
private final ThreadLocal<StringPool> stringPool = ThreadLocal.withInitial(() -> StringPool.create(10_000));
/* Truncate sentences longer than this. This is mostly a defense measure against malformed data
* that might otherwise use an undue amount of processing power. 250 words is about 10X longer than
* this comment. */
private static final int MAX_SENTENCE_LENGTH = 250;
@SneakyThrows @Inject
public SentenceExtractor(LanguageModels models) {
@ -49,12 +49,15 @@ public class SentenceExtractor {
logger.error("Could not initialize sentence detector", ex);
}
try {
rdrposTagger = new RDRPOSTagger(models.posDict, models.posRules);
}
catch (Exception ex) {
throw new IllegalStateException(ex);
synchronized (RDRPOSTagger.class) {
try {
rdrposTagger = new RDRPOSTagger(models.posDict, models.posRules);
}
catch (Exception ex) {
throw new IllegalStateException(ex);
}
}
}
public DocumentLanguageData extractSentences(Document doc) {
@ -149,10 +152,12 @@ public class SentenceExtractor {
var wordsAndSeps = SentenceSegmentSplitter.splitSegment(sentences[i]);
tokens[i] = wordsAndSeps.words;
separators[i] = wordsAndSeps.separators;
if (tokens[i].length > 250) {
tokens[i] = Arrays.copyOf(tokens[i], 250);
separators[i] = Arrays.copyOf(separators[i], 250);
if (tokens[i].length > MAX_SENTENCE_LENGTH) {
tokens[i] = Arrays.copyOf(tokens[i], MAX_SENTENCE_LENGTH);
separators[i] = Arrays.copyOf(separators[i], MAX_SENTENCE_LENGTH);
}
for (int j = 0; j < tokens[i].length; j++) {
while (tokens[i][j].endsWith(".")) {
tokens[i][j] = StringUtils.removeEnd(tokens[i][j], ".");
@ -160,25 +165,16 @@ public class SentenceExtractor {
}
}
var sPool = stringPool.get();
for (int i = 0; i < tokens.length; i++) {
tokens[i] = sPool.internalize(tokens[i]);
}
for (int i = 0; i < tokens.length; i++) {
posTags[i] = rdrposTagger.tagsForEnSentence(tokens[i]);
// don't need to internalize this
}
for (int i = 0; i < tokens.length; i++) {
tokensLc[i] = SentenceExtractorStringUtils.toLowerCaseStripPossessive(tokens[i]);
tokensLc[i] = sPool.internalize(tokensLc[i]);
}
for (int i = 0; i < tokens.length; i++) {
stemmedWords[i] = stemSentence(tokensLc[i]);
stemmedWords[i] = sPool.internalize(stemmedWords[i]);
}
DocumentSentence[] ret = new DocumentSentence[sentences.length];