54 lines
1.5 KiB
Markdown
54 lines
1.5 KiB
Markdown
|
# Docker Build Optimization Results
|
||
|
|
|
||
|
|
## Improvements Made
|
||
|
|
|
||
|
|
### 1. Multi-Stage Build
|
||
|
|
- **Before**: Single-stage with build-essential in final image
|
||
|
|
- **After**: Separate builder stage for compilation
|
||
|
|
- **Benefit**:
|
||
|
|
- Removed build-essential (80MB+) from final image
|
||
|
|
- Cleaner separation of build vs runtime dependencies
|
||
|
|
|
||
|
|
### 2. Optimized APT Install
|
||
|
|
- Added `--no-install-recommends` flag
|
||
|
|
- Prevents installing 200+ suggested packages with ffmpeg
|
||
|
|
|
||
|
|
## Build Time Comparison
|
||
|
|
|
||
|
|
| Version | Time | Notes |
|
||
|
|
|---------|------|-------|
|
||
|
|
| Original | 6m 15s (375s) | Single stage, all packages |
|
||
|
|
| Multi-stage | 5m 40s (341s) | **9% faster**, smaller image |
|
||
|
|
| + no-recommends | Expected: ~3-4m | Skips GUI/X11 packages |
|
||
|
|
|
||
|
|
## Bottleneck Analysis
|
||
|
|
|
||
|
|
**Current slowest step**: FFmpeg installation (326s / 96%)
|
||
|
|
- Installs 287 packages including full X11/Mesa/Vulkan stack
|
||
|
|
- Most are unnecessary for headless audio processing
|
||
|
|
- `--no-install-recommends` should skip ~200 optional packages
|
||
|
|
|
||
|
|
## Build Time Breakdown
|
||
|
|
|
||
|
|
```
|
||
|
|
Stage 1 (Builder): 37s
|
||
|
|
├── apt-get build-essential: ~10s
|
||
|
|
└── pip install: 27s
|
||
|
|
|
||
|
|
Stage 2 (Runtime): 327s ← BOTTLENECK
|
||
|
|
├── apt-get ffmpeg: 326s (installing 287 pkgs!)
|
||
|
|
└── Other steps: 1s
|
||
|
|
```
|
||
|
|
|
||
|
|
## Next Optimizations
|
||
|
|
|
||
|
|
1. ✅ Multi-stage build
|
||
|
|
2. ✅ Use --no-install-recommends
|
||
|
|
3. Consider: Pre-built base image with ffmpeg
|
||
|
|
4. Consider: BuildKit cache mounts for apt/pip
|
||
|
|
5. Consider: Minimal ffmpeg build from source
|
||
|
|
|
||
|
|
## Estimated Final Time
|
||
|
|
|
||
|
|
With `--no-install-recommends`: **3-4 minutes** (50% improvement)
|