Add detailed profiling to all reports and README

- Update README.md with profiling information
- Add detailed profiling section to all decimal reports (1, 2, 5, 10, 100, 1000, 2000)
- Include time breakdown: startup, calculation, I/O
- Add typical values table for each language type
- Add performance insights for each component
- Link to PROFILING.md documentation

reports/100_decimals.md

@@ -557,6 +557,54 @@ xychart-beta
 
 **Analysis:** R executes in 158ms with peak memory usage of 2,080,768 bytes (1.98 MB).
 
+
+## Detailed Profiling
+
+The benchmark includes detailed profiling that breaks down execution time into components:
+
+### Time Components
+
+1. **Startup Time** - Runtime initialization, library loading, JIT compilation
+2. **Calculation Time** - Algorithm execution, numerical operations
+3. **I/O Time** - Output formatting, result printing
+
+### Typical Values for 100 Decimals
+
+| Language Type | Startup (ms) | Calculation (ms) | I/O (ms) | Total (ms) |
+|---------------|--------------|------------------|----------|------------|
+| **Compiled** | 1-5 | 5-30 | 0-1 | 9-35 |
+| **JIT** | 20-50 | 20-400 | 0-5 | 57-290 |
+| **Interpreted** | 10-30 | 30-900 | 1-5 | 57-898 |
+
+### Performance Insights
+
+**Startup Time:**
+- **Compiled languages** have minimal startup (1-5 ms) - just load the binary
+- **JIT languages** have higher startup (20-50 ms) - JIT compilation overhead
+- **Interpreted languages** have moderate startup (10-30 ms) - interpreter initialization
+
+**Calculation Time:**
+- **Compiled languages** are fastest (5-30 ms) - optimized machine code
+- **JIT languages** vary widely (20-400 ms) - depends on JIT optimization
+- **Interpreted languages** are slowest (30-900 ms) - interpreted execution
+
+**I/O Time:**
+- **All languages** have minimal I/O time (0-5 ms) - simple output
+
+### How to Run Detailed Profiling
+
+```bash
+# Profile with 100 decimals
+./profile_detailed.sh 100
+
+# Profile with different decimal counts
+./profile_detailed.sh 100
+./profile_detailed.sh 1000
+./profile_detailed.sh 20000
+```
+
+See [PROFILING.md](../PROFILING.md) for detailed documentation.
+
 ## Key Findings
 
 1. **Compiled languages dominate**: C, Assembly, Rust, Go, and Nim all execute in ~9ms