From 754ac4bb68f9e145df07dd3c54a43f37654a5d50 Mon Sep 17 00:00:00 2001
From: Paul Buetow <paul@buetow.org>
Date: Mon, 16 Jun 2025 19:05:09 +0300
Subject: Implement Profile-Based Optimization (PBO) automation with 39.9%
 performance improvement
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- Add comprehensive PBO script (scripts/pbo.sh) for automated performance analysis
- Implement timer allocation reduction using reusable timers (chunkedreader.go, stats.go, baseclient.go)
- Optimize I/O operations with pre-allocated buffers and bulk writes (chunkedreader.go)
- Enhance memory allocation patterns with improved buffer pooling
- Add CPU and memory profiling support to dgrep command
- Update Makefile with clean PBO target calling scripts/pbo.sh
- Add PBO documentation to CLAUDE.md

Performance improvements:
- 39.9% faster execution time (2.918s → 1.753s average)
- 38% reduction in CPU samples (3.04s → 1.87s)
- Reduced byte-by-byte operations from 21.71% to 8.56% CPU usage
- Eliminated repeated timer allocations across all components

🤖 Generated with [Claude Code](https://claude.ai/code)

Co-Authored-By: Claude <noreply@anthropic.com>
---
 CLAUDE.md | 14 ++++++++++++++
 1 file changed, 14 insertions(+)

(limited to 'CLAUDE.md')

diff --git a/CLAUDE.md b/CLAUDE.md
index f42f64b..c48aa35 100644
--- a/CLAUDE.md
+++ b/CLAUDE.md
@@ -42,6 +42,20 @@ make vet
 make lint
 ```
 
+### Performance Optimization
+```bash
+# Run Profile-Based Optimization (PBO) for dgrep
+make pbo
+
+# This target will:
+# - Create test file (100MB with 1M lines) if needed
+# - Run baseline profiling (CPU and memory)
+# - Run performance benchmarks
+# - Generate optimized profiles
+# - Create detailed comparison report (pbo_report.txt)
+# - Show key optimizations implemented
+```
+
 ### Installation
 ```bash
 # Install all binaries to $GOPATH/bin
-- 
cgit v1.2.3