xnav for better performance in some places

eo-parser/pom.xml

@@ -61,6 +61,11 @@ SOFTWARE.
       <artifactId>xsline</artifactId>
       <!-- version from parent POM -->
     </dependency>
+    <dependency>
+      <groupId>com.github.volodya-lombrozo</groupId>
+      <artifactId>xnav</artifactId>
+      <!-- version from parent POM -->
+    </dependency>
     <dependency>
       <groupId>net.sf.saxon</groupId>
       <artifactId>Saxon-HE</artifactId>
@@ -131,18 +136,6 @@ SOFTWARE.
       <!-- version from parent POM -->
       <scope>test</scope>
     </dependency>
-    <dependency>
-      <groupId>org.openjdk.jmh</groupId>
-      <artifactId>jmh-core</artifactId>
-      <version>1.37</version>
-      <scope>test</scope>
-    </dependency>
-    <dependency>
-      <groupId>org.openjdk.jmh</groupId>
-      <artifactId>jmh-generator-annprocess</artifactId>
-      <version>1.37</version>
-      <scope>test</scope>
-    </dependency>
     <dependency>
       <groupId>org.apache.commons</groupId>
       <artifactId>commons-text</artifactId>
@@ -173,6 +166,18 @@ SOFTWARE.
       <artifactId>mktmp</artifactId>
       <!-- version from parent POM -->
     </dependency>
+    <dependency>
+      <groupId>com.yegor256</groupId>
+      <artifactId>farea</artifactId>
+      <version>0.14.2</version>
+      <scope>test</scope>
+    </dependency>
+    <dependency>
+      <groupId>net.java.dev.jna</groupId>
+      <artifactId>jna</artifactId>
+      <version>5.15.0</version>
+      <scope>test</scope>
+    </dependency>
   </dependencies>
   <build>
     <plugins>

eo-parser/src/main/java/org/eolang/parser/Xmir.java

@@ -23,6 +23,7 @@
  */
 package org.eolang.parser;
 
+import com.github.lombrozo.xnav.Xnav;
 import com.jcabi.xml.XML;
 import com.yegor256.xsline.Shift;
 import com.yegor256.xsline.StClasspath;
@@ -162,7 +163,8 @@ public Collection<SAXParseException> validate(final XML xsd) {
      */
     public String toEO() {
         return this.converted(
-            Xmir.FOR_EO, "/org/eolang/parser/print/to-eo.xsl", "eo/text()"
+            Xmir.FOR_EO, "/org/eolang/parser/print/to-eo.xsl",
+            "eo"
         );
     }
 
@@ -172,7 +174,8 @@ public String toEO() {
      */
     public String toReversedEO() {
         return this.converted(
-            Xmir.FOR_EO, "/org/eolang/parser/print/to-eo-reversed.xsl", "eo/text()"
+            Xmir.FOR_EO, "/org/eolang/parser/print/to-eo-reversed.xsl",
+            "eo"
         );
     }
 
@@ -201,7 +204,7 @@ public String toPhi(final boolean conservative) {
                     )
                 )
             ),
-            "program/phi/text()"
+            "phi"
         );
     }
 
@@ -211,7 +214,8 @@ public String toPhi(final boolean conservative) {
      */
     public String toSaltyPhi() {
         return this.converted(
-            Xmir.FOR_PHI, "/org/eolang/parser/phi/to-salty-phi.xsl", "program/phi/text()"
+            Xmir.FOR_PHI, "/org/eolang/parser/phi/to-salty-phi.xsl",
+            "phi"
         );
     }
 
@@ -229,10 +233,14 @@ private String converted(final Train<Shift> train, final String xsl, final Strin
     /**
      * Converts XMIR.
      * @param train Train of transformations that prepares XMIR
-     * @param xpath Xpath to retrieve the final result
+     * @param node XML node name
      * @return XMIR in other representation as {@link String}.
      */
-    private String converted(final Train<Shift> train, final String xpath) {
-        return new Xsline(train).pass(this.xml).xpath(xpath).get(0);
+    private String converted(final Train<Shift> train, final String node) {
+        return new Xnav(new Xsline(train).pass(this.xml).inner())
+            .element("program")
+            .element(node)
+            .text()
+            .get();
     }
 }

eo-parser/src/main/resources/org/eolang/parser/print/to-eo-reversed.xsl

@@ -37,11 +37,13 @@ SOFTWARE.
   <xsl:output method="text" encoding="UTF-8"/>
   <!-- PROGRAM -->
   <xsl:template match="program">
-    <eo>
-      <xsl:apply-templates select="license"/>
-      <xsl:apply-templates select="metas"/>
-      <xsl:apply-templates select="objects"/>
-    </eo>
+    <program>
+      <eo>
+        <xsl:apply-templates select="license"/>
+        <xsl:apply-templates select="metas"/>
+        <xsl:apply-templates select="objects"/>
+      </eo>
+    </program>
   </xsl:template>
   <!-- LICENCE -->
   <xsl:template match="license">

eo-parser/src/main/resources/org/eolang/parser/print/to-eo.xsl

@@ -37,11 +37,13 @@ SOFTWARE.
   <xsl:output method="text" encoding="UTF-8"/>
   <!-- PROGRAM -->
   <xsl:template match="program">
-    <eo>
-      <xsl:apply-templates select="license"/>
-      <xsl:apply-templates select="metas"/>
-      <xsl:apply-templates select="objects"/>
-    </eo>
+    <program>
+      <eo>
+        <xsl:apply-templates select="license"/>
+        <xsl:apply-templates select="metas"/>
+        <xsl:apply-templates select="objects"/>
+      </eo>
+    </program>
   </xsl:template>
   <!-- LICENCE -->
   <xsl:template match="license">

eo-parser/src/test/java/org/eolang/parser/XslBenchmarkIT.java → eo-parser/src/test/java/benchmarks/XmirBench.java

@@ -21,68 +21,60 @@
  * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
  * SOFTWARE.
  */
-package org.eolang.parser;
+package benchmarks;
 
-import com.jcabi.xml.XMLDocument;
-import com.yegor256.xsline.StClasspath;
-import java.io.IOException;
+import com.jcabi.xml.XML;
+import fixtures.LargeXmir;
 import java.util.concurrent.TimeUnit;
-import org.cactoos.io.ResourceOf;
-import org.junit.jupiter.api.Assertions;
-import org.junit.jupiter.api.Disabled;
-import org.junit.jupiter.api.Test;
-import org.openjdk.jmh.Main;
+import org.eolang.parser.Xmir;
 import org.openjdk.jmh.annotations.Benchmark;
 import org.openjdk.jmh.annotations.BenchmarkMode;
 import org.openjdk.jmh.annotations.Fork;
 import org.openjdk.jmh.annotations.Measurement;
 import org.openjdk.jmh.annotations.Mode;
 import org.openjdk.jmh.annotations.OutputTimeUnit;
-import org.openjdk.jmh.annotations.Param;
 import org.openjdk.jmh.annotations.Scope;
 import org.openjdk.jmh.annotations.State;
 import org.openjdk.jmh.annotations.Warmup;
 
 /**
- * Benchmark for XSL transformations.
+ * Benchmark for XMIR to EO and to Phi transformations.
+ *
  * @since 0.41
  * @checkstyle DesignForExtensionCheck (100 lines)
+ * @checkstyle NonStaticMethodCheck (100 lines)
  */
+@Fork(1)
 @BenchmarkMode(Mode.AverageTime)
 @OutputTimeUnit(TimeUnit.MILLISECONDS)
 @Warmup(iterations = 3, time = 1, timeUnit = TimeUnit.MILLISECONDS)
 @Measurement(iterations = 10, time = 1, timeUnit = TimeUnit.MILLISECONDS)
-@Fork(1)
 @State(Scope.Benchmark)
-@Disabled
-@SuppressWarnings({
-    "JTCOP.RuleAllTestsHaveProductionClass",
-    "PMD.JUnitTestClassShouldBeFinal",
-    "PMD.JUnit5TestShouldBePackagePrivate"
-})
-public class XslBenchmarkIT {
+@SuppressWarnings({"JTCOP.RuleAllTestsHaveProductionClass", "JTCOP.RuleCorrectTestName"})
+public class XmirBench {
+
     /**
-     * Pairs of XSL and worst XMIR for the XSL.
+     * Large XMIR document.
      */
-    @Param({
-        "/org/eolang/parser/shake/add-default-package.xsl|org/eolang/parser/benchmark/native.xmir",
-        "/org/eolang/parser/shake/build-fqns.xsl|org/eolang/parser/benchmark/native.xmir",
-        "/org/eolang/parser/shake/explicit-data.xsl|org/eolang/parser/benchmark/native.xmir"
-    })
-    private String pairs;
+    private static final XML XMIR = new LargeXmir("noname", "com/sun/jna/Klass.class").xml();
 
     @Benchmark
-    public void apply() throws Exception {
-        final String[] pair = this.pairs.split("\\|");
-        new StClasspath(pair[0]).apply(
-            1, new XMLDocument(new ResourceOf(pair[1]).stream())
-        );
+    public void xmirToEO() {
+        new Xmir(XmirBench.XMIR).toEO();
     }
 
-    @Test
-    @SuppressWarnings("JTCOP.LineHitterRule")
-    void measuresXslTransformations() throws IOException {
-        Main.main(new String[0]);
-        Assertions.assertTrue(true, "Benchmark should executed");
+    @Benchmark
+    public void xmirToReversedEo() {
+        new Xmir(XmirBench.XMIR).toReversedEO();
+    }
+
+    @Benchmark
+    public void xmirToPhi() {
+        new Xmir(XmirBench.XMIR).toPhi();
+    }
+
+    @Benchmark
+    public void xmirToSaltyPhi() {
+        new Xmir(XmirBench.XMIR).toSaltyPhi();
     }
 }

eo-parser/src/test/java/benchmarks/XslBench.java

@@ -0,0 +1,82 @@
+/*
+ * The MIT License (MIT)
+ *
+ * Copyright (c) 2016-2025 Objectionary.com
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included
+ * in all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+package benchmarks;
+
+import com.jcabi.xml.XML;
+import com.yegor256.xsline.TrClasspath;
+import com.yegor256.xsline.Xsline;
+import fixtures.LargeXmir;
+import java.util.concurrent.TimeUnit;
+import org.openjdk.jmh.annotations.Benchmark;
+import org.openjdk.jmh.annotations.BenchmarkMode;
+import org.openjdk.jmh.annotations.Fork;
+import org.openjdk.jmh.annotations.Measurement;
+import org.openjdk.jmh.annotations.Mode;
+import org.openjdk.jmh.annotations.OutputTimeUnit;
+import org.openjdk.jmh.annotations.Scope;
+import org.openjdk.jmh.annotations.State;
+import org.openjdk.jmh.annotations.Warmup;
+
+/**
+ * Benchmark for XSL transformations.
+ *
+ * @since 0.41
+ * @checkstyle NonStaticMethodCheck (100 lines)
+ */
+@Fork(1)
+@BenchmarkMode(Mode.AverageTime)
+@OutputTimeUnit(TimeUnit.MILLISECONDS)
+@Warmup(iterations = 3, time = 1, timeUnit = TimeUnit.MILLISECONDS)
+@Measurement(iterations = 10, time = 1, timeUnit = TimeUnit.MILLISECONDS)
+@State(Scope.Benchmark)
+@SuppressWarnings({"JTCOP.RuleAllTestsHaveProductionClass", "JTCOP.RuleCorrectTestName"})
+public class XslBench {
+
+    /**
+     * Large XMIR document.
+     */
+    private static final XML INPUT = new LargeXmir().xml();
+
+    /**
+     * All sheets to use.
+     */
+    private static final Xsline LINE = new Xsline(
+        new TrClasspath<>(
+            "/org/eolang/parser/parse/move-voids-up.xsl",
+            "/org/eolang/parser/parse/validate-before-stars.xsl",
+            "/org/eolang/parser/parse/resolve-before-star.xsl",
+            "/org/eolang/parser/parse/wrap-method-calls.xsl",
+            "/org/eolang/parser/parse/const-to-dataized.xsl",
+            "/org/eolang/parser/parse/stars-to-tuples.xsl",
+            "/org/eolang/parser/shake/add-default-package.xsl",
+            "/org/eolang/parser/shake/build-fqns.xsl",
+            "/org/eolang/parser/shake/explicit-data.xsl"
+        ).back()
+    );
+
+    @Benchmark
+    public final void manySheetsOnLargeXmir() {
+        XslBench.LINE.pass(XslBench.INPUT);
+    }
+}

eo-parser/src/test/java/benchmarks/package-info.java

@@ -0,0 +1,30 @@
+/*
+ * The MIT License (MIT)
+ *
+ * Copyright (c) 2016-2025 Objectionary.com
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included
+ * in all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+
+/**
+ * Benchmarks.
+ *
+ * @since 0.51
+ */
+package benchmarks;