Switch benchmark usage chart from monthly to weekly buckets

app.py

@@ -594,13 +594,13 @@ def _rounded_top_rect(x, y, w, h, r) -> str:
     )
 
 
-def svg_benchmark_monthly_usage(df: pd.DataFrame) -> str:
-    """Bars of how many model releases reported this benchmark each month, spanning
-    the whole dataset time range (empty months stay visible as gaps)."""
-    t0 = MODELS_DF["release_date"].min().to_period("M")
-    t1 = MODELS_DF["release_date"].max().to_period("M")
-    months = pd.period_range(t0, t1, freq="M")
-    counts = df["release_date"].dt.to_period("M").value_counts().reindex(months, fill_value=0)
+def svg_benchmark_weekly_usage(df: pd.DataFrame) -> str:
+    """Bars of how many model releases reported this benchmark each week, spanning
+    the whole dataset time range (empty weeks stay visible as gaps)."""
+    t0 = MODELS_DF["release_date"].min().to_period("W")
+    t1 = MODELS_DF["release_date"].max().to_period("W")
+    weeks = pd.period_range(t0, t1, freq="W")
+    counts = df["release_date"].dt.to_period("W").value_counts().reindex(weeks, fill_value=0)
 
     W, H, ML, MR, MT, MB = 920, 300, 44, 10, 12, 36
     plot_h = H - MT - MB
@@ -609,12 +609,12 @@ def svg_benchmark_monthly_usage(df: pd.DataFrame) -> str:
     step = max(1, math.ceil(vmax / 4))
     ymax = step * 4
     scale = plot_h / ymax
-    band = (W - ML - MR) / len(months)
-    bw = max(band - 2, 1.5)  # 2px surface gap between adjacent bars
+    band = (W - ML - MR) / len(weeks)
+    bw = max(band - 1, 1.0)  # 1px surface gap between adjacent bars (weekly bands are narrow)
 
     parts = [
         f'<svg class="viz" viewBox="0 0 {W} {H}" role="img" '
-        f'aria-label="Monthly count of model releases reporting this benchmark, over the whole dataset period">'
+        f'aria-label="Weekly count of model releases reporting this benchmark, over the whole dataset period">'
     ]
     for k in range(5):
         v = step * k
@@ -622,22 +622,23 @@ def svg_benchmark_monthly_usage(df: pd.DataFrame) -> str:
         parts.append(f'<line x1="{ML}" y1="{y:.1f}" x2="{W - MR}" y2="{y:.1f}" stroke="var(--grid)" stroke-width="1"/>')
         parts.append(f'<text x="{ML - 7}" y="{y + 4:.1f}" text-anchor="end" font-size="11" fill="var(--muted)">{v}</text>')
 
-    tick_months = {t.to_period("M") for t in month_ticks(months[0].to_timestamp(), months[-1].to_timestamp(how="end"))}
-    for i, month in enumerate(months):
-        x0 = ML + i * band
-        if month in tick_months:
-            cx = x0 + band / 2
+    week0_start = weeks[0].start_time
+    for tick in month_ticks(week0_start, weeks[-1].end_time):
+        idx = (tick - week0_start).days // 7
+        if 0 <= idx < len(weeks):
+            cx = ML + idx * band + band / 2
             parts.append(
                 f'<text x="{cx:.1f}" y="{base + 20}" text-anchor="middle" font-size="11" fill="var(--muted)">'
-                f"{month.to_timestamp().strftime('%b %Y')}</text>"
+                f"{tick.strftime('%b %Y')}</text>"
             )
-        n = int(counts.loc[month])
+    for i, week in enumerate(weeks):
+        n = int(counts.loc[week])
         if n == 0:
             continue
         h = n * scale
-        label = f"{month.to_timestamp().strftime('%b %Y')}: {n} model{'s' if n != 1 else ''}"
+        label = f"Week of {week.start_time.strftime('%b %-d, %Y')}: {n} model{'s' if n != 1 else ''}"
         parts.append(
-            f'<path class="seg" d="{_rounded_top_rect(x0 + 1, base - h, bw, h, 4)}" fill="var(--accent)">'
+            f'<path class="seg" d="{_rounded_top_rect(ML + i * band + 0.5, base - h, bw, h, 2)}" fill="var(--accent)">'
             f"<title>{esc(label)}</title></path>"
         )
     parts.append(f'<line x1="{ML}" y1="{base}" x2="{W - MR}" y2="{base}" stroke="var(--muted)" stroke-width="1"/>')
@@ -666,8 +667,8 @@ def benchmark_view(benchmark):
     )
 
     chart = (
-        f'<div class="viz-title">How often is “{esc(benchmark)}” used? Model releases reporting it per month</div>'
-        + svg_benchmark_monthly_usage(df)
+        f'<div class="viz-title">How often is “{esc(benchmark)}” used? Model releases reporting it per week</div>'
+        + svg_benchmark_weekly_usage(df)
     )
 
     rows = []