diff --git a/tinygrad/device.py b/tinygrad/device.py
index 4b26bae3fb..721da7e50e 100644
--- a/tinygrad/device.py
+++ b/tinygrad/device.py
@@ -7,6 +7,7 @@ from tinygrad.helpers import CI, OSX, LRU, getenv, diskcache_get, diskcache_put,
                              cpu_time_execution, colored, Context, round_up, DISABLE_COMPILER_CACHE, ALLOW_DEVICE_USAGE
 from tinygrad.dtype import DType, ImageDType, PtrDType, dtypes, _to_np_dtype
 from tinygrad.renderer import Renderer
+from tinygrad.uop.ops import TracingKey
 
 # **************** Device ****************
 
@@ -56,8 +57,8 @@ class ProfileEvent: pass
 class ProfileDeviceEvent(ProfileEvent):
   device:str; comp_tdiff:decimal.Decimal=decimal.Decimal(0); copy_tdiff:decimal.Decimal=decimal.Decimal(0) # noqa: E702
 
-@dataclass(frozen=True)
-class ProfileRangeEvent(ProfileEvent): device:str; name:str; st:decimal.Decimal; en:decimal.Decimal; is_copy:bool # noqa: E702
+@dataclass
+class ProfileRangeEvent(ProfileEvent): device:str; name:str|TracingKey; st:decimal.Decimal; en:decimal.Decimal|None=None; is_copy:bool=False # noqa: E702
 
 @dataclass(frozen=True)
 class ProfilePointEvent(ProfileEvent): device:str; name:str; st:decimal.Decimal; ref:int; arg:dict=field(default_factory=dict) # noqa: E702
@@ -71,17 +72,13 @@ class ProfileGraphEntry: device:str; name:str; st_id:int; en_id:int; is_copy:boo
 @dataclass(frozen=True)
 class ProfileGraphEvent(ProfileEvent): ents:list[ProfileGraphEntry]; deps:list[list[int]]; sigs:list[decimal.Decimal] # noqa: E702
 
-@dataclass
-class ProfileResult: st:Optional[int]=None; en:Optional[int]=None # noqa: E702
-
 @contextlib.contextmanager
-def cpu_profile(name, device="CPU", is_copy=False, display=True) -> Generator[ProfileResult, None, None]:
-  res = ProfileResult(st:=time.perf_counter_ns())
+def cpu_profile(name, device="CPU", is_copy=False, display=True) -> Generator[ProfileRangeEvent, None, None]:
+  res = ProfileRangeEvent(device, name, decimal.Decimal(time.perf_counter_ns()) / 1000, is_copy=is_copy)
   try: yield res
   finally:
-    res.en = en = time.perf_counter_ns()
-    if PROFILE and display:
-      Compiled.profile_events += [ProfileRangeEvent(device, name, decimal.Decimal(st) / 1000, decimal.Decimal(en) / 1000, is_copy=is_copy)]
+    res.en = decimal.Decimal(time.perf_counter_ns()) / 1000
+    if PROFILE and display: Compiled.profile_events.append(res)
 
 # **************** Buffer + Allocators ****************
 
diff --git a/tinygrad/uop/ops.py b/tinygrad/uop/ops.py
index 4ad95d3dc5..f310324634 100644
--- a/tinygrad/uop/ops.py
+++ b/tinygrad/uop/ops.py
@@ -767,6 +767,13 @@ class TrackedGraphRewrite:
   name: str|None                                                                             # optional name of the rewrite
   depth: int                                                                                 # depth if it's a subrewrite
   bottom_up: bool
+
+@dataclass(frozen=True)
+class TracingKey:
+  display_name:str        # display name of this trace event
+  keys:tuple[str, ...]=() # optional keys to search for related traces
+  cat:str|None=None       # optional category to color this by
+
 tracked_keys:list[Any] = []
 tracked_ctxs:list[list[TrackedGraphRewrite]] = []
 _name_cnt:dict[str, itertools.count] = {}
@@ -784,10 +791,15 @@ def track_rewrites(name:Callable|bool=True):
       if TRACK_MATCH_STATS >= 2:
         tracked_keys.append((fn:=func.__name__)+f" n{next(_name_cnt.setdefault(fn, itertools.count(1)))}")
         tracked_ctxs.append([])
-      ret = func(*args, **kwargs)
+      # late import!
+      from tinygrad.device import cpu_profile
+      with cpu_profile(func.__name__, "TINY") as e:
+        ret = func(*args, **kwargs)
       if TRACK_MATCH_STATS >= 2 and callable(name):
         name_ret = name(*args, **kwargs, ret=ret)
-        tracked_keys[-1] = tracked_keys[-1].replace(fn, name_ret) if isinstance(name_ret, str) else name_ret
+        tracked_keys[-1] = key = tracked_keys[-1].replace(fn, name_ret) if isinstance(name_ret, str) else name_ret
+        if isinstance(key, str): e.name = TracingKey(key, (key,), func.__name__)
+        else: e.name = TracingKey(f"{func.__name__} for {name_ret.name}", (name_ret.name,), func.__name__)
       if getenv("CAPTURE_PROCESS_REPLAY"):
         # find the unittest frame we're capturing in
         frm = sys._getframe(1)
diff --git a/tinygrad/viz/js/index.js b/tinygrad/viz/js/index.js
index 3b714974f0..b696fafe09 100644
--- a/tinygrad/viz/js/index.js
+++ b/tinygrad/viz/js/index.js
@@ -108,7 +108,8 @@ function formatTime(ts, dur=ts) {
 }
 const formatUnit = (d, unit="") => d3.format(".3~s")(d)+unit;
 
-const colors = ["#1D1F2A", "#2A2D3D", "#373B4F", "#444862", "#12131A", "#2F3244", "#3B3F54", "#4A4E65", "#181A23", "#232532", "#313548", "#404459"];
+const devColors = {"TINY":["#1B5745", "#1D2E62"],
+                   "DEFAULT":["#1D1F2A", "#2A2D3D", "#373B4F", "#444862", "#12131A", "#2F3244", "#3B3F54", "#4A4E65", "#181A23", "#232532", "#313548", "#404459"],}
 const bufColors = ["#3A57B7","#5066C1","#6277CD","#7488D8","#8A9BE3","#A3B4F2"];
 
 var profileRet, focusedDevice, canvasZoom, zoomLevel = d3.zoomIdentity;
@@ -141,12 +142,14 @@ async function renderProfiler() {
     const levelHeight = baseHeight-padding;
     const offsetY = baseY-canvasTop+padding/2;
     for (const [i,e] of timeline.shapes.entries()) {
-     if (!nameMap.has(e.name)) {
-       const label = parseColors(e.name).map(({ color, st }) => ({ color, st, width:ctx.measureText(st).width }));
-       nameMap.set(e.name, { fillColor:colors[i%colors.length], label });
-     }
-     // offset y by depth
-     data.shapes.push({ x:e.st-st, dur:e.dur, name:e.name, height:levelHeight, y:offsetY+levelHeight*e.depth, ref:e.ref, ...nameMap.get(e.name) });
+      const label = parseColors(e.name).map(({ color, st }) => ({ color, st, width:ctx.measureText(st).width }));
+      const colorKey = e.cat ?? e.name;
+      if (!nameMap.has(colorKey)) {
+        const colors = devColors[k] ?? devColors.DEFAULT;
+        nameMap.set(colorKey, { fillColor:colors[i%colors.length] });
+      }
+      // offset y by depth
+      data.shapes.push({ x:e.st-st, dur:e.dur, name:e.name, height:levelHeight, y:offsetY+levelHeight*e.depth, ref:e.ref, label, ...nameMap.get(colorKey) });
     }
     // position shapes on the canvas and scale to fit fixed area
     const startY = offsetY+(levelHeight*timeline.maxDepth)+padding/2;
diff --git a/tinygrad/viz/serve.py b/tinygrad/viz/serve.py
index 16c471d2f9..49ad8e25f4 100755
--- a/tinygrad/viz/serve.py
+++ b/tinygrad/viz/serve.py
@@ -4,7 +4,7 @@ from http.server import BaseHTTPRequestHandler
 from urllib.parse import parse_qs, urlparse
 from typing import Any, TypedDict, Generator
 from tinygrad.helpers import colored, getenv, tqdm, unwrap, word_wrap, TRACEMETA
-from tinygrad.uop.ops import TrackedGraphRewrite, UOp, Ops, printable, GroupOp, srender, sint
+from tinygrad.uop.ops import TrackedGraphRewrite, TracingKey, UOp, Ops, printable, GroupOp, srender, sint
 from tinygrad.renderer import ProgramSpec
 from tinygrad.device import ProfileEvent, ProfileDeviceEvent, ProfileRangeEvent, ProfileGraphEvent, ProfileGraphEntry, ProfilePointEvent
 from tinygrad.dtype import dtypes
@@ -114,9 +114,12 @@ def timeline_layout(events:list[tuple[int, int, float, DevEvent]]) -> dict:
     depth = next((i for i,level_et in enumerate(levels) if st>=level_et), len(levels))
     if depth < len(levels): levels[depth] = et
     else: levels.append(et)
-    name = e.name
+    name, cat = e.name, None
     if (ref:=ref_map.get(name)) is not None: name = ctxs[ref]["name"]
-    shapes.append({"name":name, "ref":ref, "st":st, "dur":dur, "depth":depth})
+    elif isinstance(e.name, TracingKey):
+      name, cat = e.name.display_name, e.name.cat
+      ref = next((v for k in e.name.keys if (v:=ref_map.get(k)) is not None), None)
+    shapes.append({"name":name, "ref":ref, "st":st, "dur":dur, "depth":depth, "cat":cat})
   return {"shapes":shapes, "maxDepth":len(levels)}
 
 def mem_layout(events:list[tuple[int, int, float, DevEvent]]) -> dict: