\n ## Stacked Bar Chart: Build Duration Breakdown by Software Project and Configuration ### Overview This image is a stacked bar chart comparing the overall build duration (in seconds) for nine different software projects. Each project is analyzed under three configurations: HS, ES, and ES+. The total duration for each configuration is broken down into six constituent phases, represented by different colors in the stacked bars. ### Components/Axes * **Y-Axis:** Labeled "Overall duration (s)". The scale runs from 0 to 500 seconds, with major gridlines at 100-second intervals. * **X-Axis (Panels):** The chart is divided into nine vertical panels, each dedicated to a specific software project. The project names and versions are listed at the top of each panel: 1. GProlog (1.6.0) 2. Hello (2.10) 3. IPXE (1.21.1) 4. Scheme48 (1.9.3) 5. NeoVIM (0.11.0) 6. LibSodium (1.0.20) 7. TinyCC (0.9.28) 8. Verifier Client 9. XZ Utils (5.6.3) * **X-Axis (Categories):** Within each panel, three bars are plotted, labeled "HS", "ES", and "ES+" from left to right. * **Legend:** Positioned at the bottom center of the chart. It defines the six phases that compose each stacked bar: * **Start EIF** (Dark Blue) * **Boot** (Light Blue) * **Runner init** (Orange) * **Checkout** (Light Orange/Peach) * **Configure** (Light Green) * **Build** (Dark Green) ### Detailed Analysis The chart reveals significant variation in build times across projects and configurations. The **ES+** configuration consistently results in the longest build duration for every project. The **Build** phase (dark green) is the dominant contributor to total time in nearly all cases, especially for ES+. The **Configure** phase (light green) is the second most significant contributor in many ES+ bars. **Project-Specific Data Points (Approximate Total Durations):** * **GProlog (1.6.0):** HS ≈ 20s, ES ≈ 60s, ES+ ≈ 90s. * **Hello (2.10):** HS ≈ 10s, ES ≈ 50s, ES+ ≈ 100s. The Configure segment is notably large in the ES+ bar. * **IPXE (1.21.1):** HS ≈ 50s, ES ≈ 90s, ES+ ≈ 240s. The Build phase dominates the ES+ bar. * **Scheme48 (1.9.3):** HS ≈ 20s, ES ≈ 60s, ES+ ≈ 80s. * **NeoVIM (0.11.0):** This project has the longest build times. HS ≈ 270s, ES ≈ 280s, ES+ ≈ 490s. The ES+ bar is the tallest in the chart, with an enormous Build segment and a very large Configure segment. * **LibSodium (1.0.20):** HS ≈ 40s, ES ≈ 80s, ES+ ≈ 190s. * **TinyCC (0.9.28):** HS ≈ 10s, ES ≈ 40s, ES+ ≈ 50s. This project shows the smallest absolute increase from ES to ES+. * **Verifier Client:** HS ≈ 80s, ES ≈ 110s, ES+ ≈ 160s. * **XZ Utils (5.6.3):** HS ≈ 30s, ES ≈ 60s, ES+ ≈ 150s. **Phase Contribution Trend:** For the ES+ configuration, the **Build** phase typically accounts for over 50% of the total duration. The **Start EIF**, **Boot**, **Runner init**, and **Checkout** phases combined generally constitute a smaller, more consistent portion of the time across all projects and configurations. ### Key Observations 1. **NeoVIM is an Outlier:** Its build times, particularly for ES+, are dramatically higher than all other projects, suggesting it is a much more complex or resource-intensive build. 2. **Configuration Impact:** Moving from HS to ES to ES+ almost universally increases build time. The jump from ES to ES+ is often the most significant. 3. **Phase Dominance:** The **Build** phase is the primary bottleneck. Optimizations targeting this phase would yield the greatest reduction in overall build time. 4. **Project Variability:** The absolute build times vary by an order of magnitude (e.g., TinyCC's ES+ at ~50s vs. NeoVIM's ES+ at ~490s), indicating vast differences in project scale or build process complexity. ### Interpretation This chart is a performance analysis tool for a build system or continuous integration (CI) environment. The configurations (HS, ES, ES+) likely represent different levels of build isolation, resource allocation, or feature enablement (e.g., HS=Host System, ES=Emulated System, ES+=Emulated System with additional features). The data demonstrates that **enabling more features or stricter isolation (moving to ES+) comes at a significant time cost**, primarily due to the **Build** phase expanding. This suggests the build process itself is sensitive to the underlying execution environment. The **Configure** phase also scales with configuration complexity for some projects. The outlier status of **NeoVIM** implies its build process is either inherently more complex or is particularly poorly suited to the ES/ES+ environments. A systems engineer would use this data to: * Identify which projects are most affected by configuration changes. * Prioritize optimization efforts on the **Build** and **Configure** phases. * Make informed decisions about the trade-off between build environment robustness (ES+) and developer/CI wait times. * Investigate why NeoVIM's build scales so poorly compared to others.