diff --git a/.gitignore b/.gitignore
index f8f5015..44415db 100644
--- a/.gitignore
+++ b/.gitignore
@@ -11,6 +11,7 @@ man
 builds
 envr
 envr-go
+envr-prof
 findr/findr
 findr/findr-prof
 findr/bench-*.md
diff --git a/Makefile b/Makefile
index f87baba..cce9c31 100644
--- a/Makefile
+++ b/Makefile
@@ -10,7 +10,7 @@ LINUX_AMD64_BIN := $(BUILD_DIR)/$(APP_NAME)-$(VERSION)-linux-amd64
 LINUX_ARM64_BIN := $(BUILD_DIR)/$(APP_NAME)-$(VERSION)-linux-arm64
 DARWIN_ARM64_BIN := $(BUILD_DIR)/$(APP_NAME)-$(VERSION)-darwin-arm64
 
-.PHONY: all clean cleanall build-linux build-darwin compress release help
+.PHONY: all clean cleanall build-linux build-darwin compress release profile help
 
 # Default target
 all: release clean
@@ -66,6 +66,12 @@ release: build-linux compress
 	@echo "Release artifacts created:"
 	@ls -la $(BUILD_DIR)/*.tar.gz $(BUILD_DIR)/*.zip 2>/dev/null || echo "No compressed artifacts found"
 
+# Build with spall profiling instrumentation
+profile:
+	@echo "Building with spall profiling..."
+	odin build . -define:SPALL=true -o:speed -out:envr-prof
+	@echo "Built envr-prof (run it to generate envr.spall)"
+
 # Clean binary files only
 clean:
 	@echo "Cleaning binary files..."
@@ -84,6 +90,7 @@ help:
 	@echo "  build-linux  - Build Linux binaries only"
 	@echo "  build-darwin - Build Darwin binaries only"
 	@echo "  compress    - Compress all built binaries"
+	@echo "  profile     - Build with spall profiling instrumentation"
 	@echo "  clean       - Remove binary files only"
 	@echo "  cleanall    - Remove entire build directory"
 	@echo "  help        - Show this help message"
diff --git a/main.odin b/main.odin
index 24cb238..0192c89 100644
--- a/main.odin
+++ b/main.odin
@@ -1,10 +1,36 @@
 package main
 
+import "base:runtime"
 import "core:fmt"
 import "core:mem"
 import "core:os"
+import "core:prof/spall"
+import "core:sync"
+
+SPALL :: #config(SPALL, false)
+when SPALL {
+	spall_ctx: spall.Context
+	@(thread_local)
+	spall_buffer: spall.Buffer
+}
 
 main :: proc() {
+	when SPALL {
+		ctx, spall_ok := spall.context_create_with_scale("envr.spall", false, 1.0)
+		if !spall_ok {
+			fmt.eprintln("Failed to create spall trace file")
+			os.exit(1)
+		}
+		spall_ctx = ctx
+		defer spall.context_destroy(&spall_ctx)
+
+		spall_backing := make([]u8, spall.BUFFER_DEFAULT_SIZE)
+		defer delete(spall_backing)
+
+		spall_buffer = spall.buffer_create(spall_backing, u32(sync.current_thread_id()))
+		defer spall.buffer_destroy(&spall_ctx, &spall_buffer)
+	}
+
 	when ODIN_DEBUG {
 		heap_track: mem.Tracking_Allocator
 		mem.tracking_allocator_init(&heap_track, context.allocator)
@@ -60,3 +86,21 @@ main :: proc() {
 	}
 }
 
+when SPALL {
+	@(instrumentation_enter)
+	spall_enter :: proc "contextless" (
+		proc_address, call_site_return_address: rawptr,
+		loc: runtime.Source_Code_Location,
+	) {
+		spall._buffer_begin(&spall_ctx, &spall_buffer, "", "", loc)
+	}
+
+	@(instrumentation_exit)
+	spall_exit :: proc "contextless" (
+		proc_address, call_site_return_address: rawptr,
+		loc: runtime.Source_Code_Location,
+	) {
+		spall._buffer_end(&spall_ctx, &spall_buffer)
+	}
+}
+
diff --git a/test_cond_import b/test_cond_import
new file mode 100755
index 0000000..c9598aa
Binary files /dev/null and b/test_cond_import differ