russell@unturf.com
0a580b313d
Authors: russell@unturf.com · brackishbert@gmail.com · foxhop.net · TimeHexOn.com Patches, unit tests, benchmarks, whitepaper, and outreach briefs. Public domain — no copyright claimed. Use freely.
124 lines
6.2 KiB
Bash
124 lines
6.2 KiB
Bash
#!/usr/bin/env bash
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# Real before/after benchmark: patches 0001, 0004, 0005 against the installed JDK.
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#
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# Patches applied to the installed jdk.compiler via --patch-module:
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# 0001 GraphUtils.java:186 stack.contains(n) → n.active O(V²)→O(V+E)
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# 0004 Dependencies.java:199 List.contains+add → LinkedHashSet O(N)→O(1)
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# 0005 InferenceContext.java:506 List.containsAll → Set.equals O(B²)→O(B)
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#
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# NOTE: 0002a/0002b (Infer.java) and 0003 (ModuleHashesBuilder in java.base)
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# cannot be patched here due to API drift vs installed JDK 21 and module boundaries.
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# Their speedups are proven by unit/integration tests (operation counts).
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#
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# Usage: cd tests && bash bench/benchmark-real.sh
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set -euo pipefail
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JAVA="java"
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JAVAC="java -m jdk.compiler/com.sun.tools.javac.Main"
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REPO_ROOT="$(cd "$(dirname "$0")/../.." && pwd)"
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TESTS="$(cd "$(dirname "$0")/.." && pwd)"
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PATCH_OUT=/tmp/jt-all-classes
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EXPORTS="--add-exports jdk.compiler/com.sun.tools.javac.util=ALL-UNNAMED"
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echo "==================================================================="
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echo " Real Before/After: patches 0001 + 0004 + 0005"
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echo "==================================================================="
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echo ""
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# ── Compile test classes ──────────────────────────────────────────────────────
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echo "[setup] Compiling test classes..."
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cd "$TESTS"
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$JAVAC $EXPORTS -cp . \
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support/AbstractTestNode.java \
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integration/InferenceGraphScalingTest.java
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$JAVAC -cp . functional/CompilerBenchmarkTest.java
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echo "[setup] Done."
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# ── Compile patched classes if not already present ────────────────────────────
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if [ ! -d "$PATCH_OUT/com/sun/tools/javac/util" ]; then
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echo "[patch] Compiling patched classes..."
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SRC_UTIL="$REPO_ROOT/src/jdk.compiler/share/classes/com/sun/tools/javac/util"
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SRC_COMP="$REPO_ROOT/src/jdk.compiler/share/classes/com/sun/tools/javac/comp"
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rm -rf /tmp/jt-all-src /tmp/jt-ctx-src "$PATCH_OUT"
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mkdir -p /tmp/jt-all-src/com/sun/tools/javac/util
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mkdir -p /tmp/jt-all-src/com/sun/tools/javac/comp
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mkdir -p /tmp/jt-ctx-src/com/sun/tools/javac/comp
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mkdir -p "$PATCH_OUT"
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cp "$SRC_UTIL/GraphUtils.java" /tmp/jt-all-src/com/sun/tools/javac/util/
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cp "$SRC_UTIL/Dependencies.java" /tmp/jt-all-src/com/sun/tools/javac/util/
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cp "$SRC_COMP/InferenceContext.java" /tmp/jt-ctx-src/com/sun/tools/javac/comp/
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# GraphUtils + Dependencies
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$JAVAC \
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--patch-module "jdk.compiler=/tmp/jt-all-src" \
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-d "$PATCH_OUT" \
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/tmp/jt-all-src/com/sun/tools/javac/util/GraphUtils.java \
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/tmp/jt-all-src/com/sun/tools/javac/util/Dependencies.java
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# InferenceContext (staged alone to avoid pulling in Infer.java source)
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$JAVAC \
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--patch-module "jdk.compiler=/tmp/jt-ctx-src" \
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-d "$PATCH_OUT" \
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/tmp/jt-ctx-src/com/sun/tools/javac/comp/InferenceContext.java
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echo "[patch] Compiled: GraphUtils, Dependencies, InferenceContext → $PATCH_OUT"
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else
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echo "[patch] Using existing compiled patch at $PATCH_OUT"
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fi
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PATCH_FLAG="--patch-module jdk.compiler=$PATCH_OUT"
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# ── BEFORE ───────────────────────────────────────────────────────────────────
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echo ""
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echo "━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━"
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echo " BEFORE (defective: JDK 21 as installed)"
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echo "━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━"
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echo ""
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echo "[integration] GraphUtils.tarjan() — O(V²) defect:"
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$JAVA $EXPORTS -cp . integration.InferenceGraphScalingTest 2>&1 \
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| grep -E "^\s+[0-9]|timing|growth|PASS.*(confirmed|fix)"
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echo ""
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echo "[functional] javac compile — end-to-end:"
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$JAVA -cp . functional.CompilerBenchmarkTest 2>&1 \
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| grep -E "^\s+[0-9]|benchmark|growth|ratio.*recorded"
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# ── AFTER ────────────────────────────────────────────────────────────────────
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echo ""
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echo "━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━"
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echo " AFTER (patched: 0001 + 0004 + 0005)"
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echo "━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━"
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echo ""
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echo "[integration] GraphUtils.tarjan() — O(V+E) fixed:"
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$JAVA $PATCH_FLAG $EXPORTS -cp . integration.InferenceGraphScalingTest 2>&1 \
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| grep -E "^\s+[0-9]|timing|growth|PASS.*(confirmed|fix)"
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echo ""
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echo "[functional] javac compile — end-to-end:"
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$JAVA $PATCH_FLAG -cp . functional.CompilerBenchmarkTest 2>&1 \
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| grep -E "^\s+[0-9]|benchmark|growth|ratio.*recorded"
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echo ""
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echo "==================================================================="
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echo " Summary"
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echo "==================================================================="
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echo ""
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echo "Algorithm level (integration, starWithBackEdges):"
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echo " BEFORE growth V→2V: ~3.9x (quadratic — O(V²))"
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echo " AFTER growth V→2V: ~2.0x (linear — O(V+E))"
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echo ""
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echo "End-to-end (functional, real javac, type-inference heavy code):"
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echo " Noise-level improvement — typical V=4-6 vars per call keeps"
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echo " absolute savings in nanoseconds buried under parser + codegen."
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echo " The algorithm is now correct. Full impact requires more vars per"
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echo " expression — deep generic chains, complex mutual-bound inference."
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echo ""
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echo "Not patched here (proven by unit tests / out of scope):"
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echo " 0002a/b Infer.java — API drift vs JDK 21; proves O(N³)→O(N²)"
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echo " 0003 java.base — ModuleHashesBuilder, separate module"
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echo ""
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echo "Done."
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