andros
fb45f6a582
Mermaid's xychart-beta cannot draw grouped bars or a legend: two bar series overlap on the same axis position, so the paired GPU-vs-cairo comparison was unreadable. Render the charts as images with real grouped bars, value labels and a legend (bench/make-charts.py), and embed them from .github/assets/.
95 lines
3.1 KiB
Python
95 lines
3.1 KiB
Python
#!/usr/bin/env python3
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"""Render the benchmark charts as grouped-bar images.
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Mermaid's xychart-beta cannot draw grouped (side-by-side) bars or a
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legend, so the README embeds these generated images instead. Run this
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after updating the numbers in the README tables:
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python3 bench/make-charts.py
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Output PNGs go to .github/assets/.
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"""
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import os
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import matplotlib
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matplotlib.use("Agg")
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import matplotlib.pyplot as plt
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from matplotlib.ticker import MaxNLocator
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GPU = "#43b97f"
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CAIRO = "#4f81e5"
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COCOA = "#4f81e5"
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HERE = os.path.dirname(os.path.abspath(__file__))
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OUT = os.path.join(HERE, "..", ".github", "assets")
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WORKLOADS = ["Line scroll", "Page scroll", "Full redraw", "Typing", "Image scroll"]
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# (filename, title, gpu values, cairo values, x-axis label)
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PAIRED = [
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("bench-linux-1616.png",
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"1616x912 frame: redisplays per second (higher is better)",
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[487, 296, 294, 1311, 1239],
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[530, 297, 247, 1857, 1359]),
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("bench-linux-4k.png",
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"4K frame: redisplays per second (higher is better)",
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[240, 124, 121, 1766, 1328],
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[117, 102, 66, 238, 115]),
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]
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def paired_chart(fname, title, gpu, cairo):
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fig, ax = plt.subplots(figsize=(9, 4.5), dpi=140)
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y = range(len(WORKLOADS))
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h = 0.38
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# GPU on top of each pair, cairo just below.
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ax.barh([i + h / 2 for i in y], gpu, height=h, color=GPU, label="GPU (OpenGL)")
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ax.barh([i - h / 2 for i in y], cairo, height=h, color=CAIRO, label="Stock (cairo)")
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ax.set_yticks(list(y))
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ax.set_yticklabels(WORKLOADS)
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ax.invert_yaxis()
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ax.set_xlabel("redisplays per second")
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ax.set_title(title)
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ax.legend(loc="lower right", frameon=False)
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ax.spines[["top", "right"]].set_visible(False)
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top = max(max(gpu), max(cairo))
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ax.set_xlim(0, top * 1.12)
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for i in y:
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ax.text(gpu[i] + top * 0.01, i + h / 2, str(gpu[i]),
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va="center", ha="left", fontsize=8, color="#2a2a2a")
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ax.text(cairo[i] + top * 0.01, i - h / 2, str(cairo[i]),
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va="center", ha="left", fontsize=8, color="#2a2a2a")
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fig.tight_layout()
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fig.savefig(os.path.join(OUT, fname), facecolor="white")
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plt.close(fig)
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print("wrote", fname)
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def macos_chart():
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fname = "bench-macos-cpu.png"
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labels = ["Stock (Cocoa)", "GPU vsync on", "GPU vsync off"]
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vals = [16.0, 10.5, 15.5]
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colors = [COCOA, GPU, GPU]
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fig, ax = plt.subplots(figsize=(9, 3.0), dpi=140)
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y = range(len(labels))
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ax.barh(list(y), vals, height=0.5, color=colors)
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ax.set_yticks(list(y))
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ax.set_yticklabels(labels)
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ax.invert_yaxis()
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ax.set_xlabel("CPU seconds")
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ax.set_title("M1 Pro: CPU to render 15 s of flat-out scroll (lower is better)")
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ax.spines[["top", "right"]].set_visible(False)
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ax.set_xlim(0, max(vals) * 1.12)
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for i in y:
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ax.text(vals[i] + max(vals) * 0.01, i, f"{vals[i]:.1f} s",
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va="center", ha="left", fontsize=8, color="#2a2a2a")
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fig.tight_layout()
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fig.savefig(os.path.join(OUT, fname), facecolor="white")
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plt.close(fig)
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print("wrote", fname)
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if __name__ == "__main__":
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os.makedirs(OUT, exist_ok=True)
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for args in PAIRED:
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paired_chart(*args)
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macos_chart()
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