Support hardware counters in plotting scripts

CHANGELOG.md

@@ -2,50 +2,8 @@
 
 ## Breaking changes
 
-- Benchmarked commands are now always executed directly, without an intermediate shell (`--shell=none`). Use `-S` (an alias for `--shell=default`) to restore the previous behavior (`sh` on Unix, `cmd.exe` on Windows), or select a shell with `--shell <SHELL>`.
-- The JSON format for `--export-json` has changed (schema version 2). The new format now includes metadata, per-run measurements, and statistical summaries for all measured quantities, see #790 (@sharkdp). Code that reads those exported JSON files must be updated. For example, `results[i].mean` is now `results[i].summary.time_wall_clock.mean`, and `results[i].times` is replaced by `results[i].measurements[j].time_wall_clock.value`. The new structure looks like this:
-
-  ```python
-  {
-      "schema_version": 2,
-      "metadata": {
-          "hyperfine_version": "1.21.0",
-          "start_time": "2026-10-06T12:00:00Z",
-          "platform": {"os": "Linux", "architecture": "x86_64"}
-      },
-      "results": [
-          {
-              "command": "sleep 1",  # Actual command after parameter substitution
-              "name": "wait 1s",  # Optional custom name, separate from the command
-              "parameters": {"duration": {"value": "1"}},  # Values are now objects
-              "measurements": [  # One entry per run, excluding warmups
-                  {
-                      "time_wall_clock": {"value": 1.0, "unit": "second"},
-                      "time_user": {"value": 0.0, "unit": "second"},
-                      "time_system": {"value": 0.0, "unit": "second"},
-                      "memory_peak_resident": {"value": 1048576.0, "unit": "byte"},
-                      "exit_code": 0
-                  },
-                  ...  # Further runs omitted
-              ],
-              "summary": {
-                  "time_wall_clock": {
-                      "unit": "second",
-                      "count": 2,
-                      "mean": 1.0,
-                      "stddev": 0.0,
-                      "median": 1.0,
-                      "min": 1.0,
-                      "max": 1.0
-                  }
-                  # Other metrics have the same summary structure.
-              }
-          }
-      ]
-  }
-  ```
-
-  Times are always exported in seconds and memory in bytes.
+- Execute commands directly by default (`--shell=none`). Use `-S` (an alias for `--shell=default`) to restore the previous behavior (`sh` on Unix, `cmd.exe` on Windows), or select a shell with `--shell <SHELL>`.
+- Repurpose `-S` as an alias for `--shell=default`. It no longer accepts a shell argument; replace `-S <SHELL>` with `--shell <SHELL>`.
 
 # v1.21.0
 

README.md

@@ -184,9 +184,7 @@ The JSON export includes the following metrics for each measured run (excluding
 
   - Linux/macOS: Peak resident set size (RSS). This is the largest per-process peak among the
     command and child processes (whose usage is collected when their parents wait for them),
-    *not the simultaneous total memory of the full process tree*. On Linux, measuring commands
-    with a very small peak RSS (below the peak inherited from hyperfine at startup, which can
-    be a few MiB) will currently result in that inherited value being reported instead.
+    *not the simultaneous total memory of the full process tree*.
   - Windows: Currently not supported.
 
 - **`cpu_cycles`**: CPU cycles consumed.