diff --git a/src/run/runner/wall_time/perf/mod.rs b/src/run/runner/wall_time/perf/mod.rs
index 7cefc097..c9386bc7 100644
--- a/src/run/runner/wall_time/perf/mod.rs
+++ b/src/run/runner/wall_time/perf/mod.rs
@@ -94,7 +94,9 @@ impl PerfRunner {
             || config.command.contains("uv")
             || config.command.contains("python")
         {
-            (UnwindingMode::Dwarf, Some(65528))
+            // Max supported stack size is 64KiB, but this will increase the file size by a lot. In
+            // order to allow uploads and maintain accuracy, we limit this to 8KiB.
+            (UnwindingMode::Dwarf, Some(8 * 1024))
         } else {
             // Default to dwarf unwinding since it works well with most binaries.
             debug!("No call graph mode detected, defaulting to dwarf");