diff --git a/src/geo/wasm.js b/src/geo/wasm.js
index 003416ca..88f38ac7 100644
--- a/src/geo/wasm.js
+++ b/src/geo/wasm.js
@@ -17,7 +17,6 @@ if (!self.window) (function() {
 
     const factor = self.base.config.clipper;
     const geo = self.geo;
-    const debug = false;
 
     function log() {
         console.log(...arguments);
@@ -141,20 +140,6 @@ if (!self.window) (function() {
         return tops;
     }
 
-    function runTests() {
-        let newPolygon = self.base.newPolygon;
-        let p1 = newPolygon().centerCircle({x:2,y:2,z:0}, 2, 50);
-        // let p1 = newPolygon().add(0,0).add(4,0).add(4,4).add(0,4);
-        let p2 = p1.clone().setZ(0).move({x:2, y:2});
-        let d1 = [];
-        let d2 = [];
-        geo.wasm.js.diff([p1], [p2], 0, d1, d2);
-        console.log('diff',{p1:p1.points, p2:p2.points, d1:d1[0].points, d2:d2[0].points});
-        let o1 = geo.wasm.js.offset([p1], 1, 0);
-        console.log('offs',{o1:o1[0].points});
-		wasm.test_string(5);
-    }
-
     function readString(pos, len) {
         let view = new DataReader(geo.wasm.heap, pos);
         let out = [];
@@ -173,9 +158,7 @@ if (!self.window) (function() {
             .then(response => response.arrayBuffer())
             .then(bytes => WebAssembly.instantiate(bytes, {
                 env: {
-                    polygon: (a,b) => { console.log('polygon',a,b) },
-                    point: (a,b) => { console.log('point',a,b) },
-                    ostr: (len, ptr) => { console.log('ostr', readString(ptr, len)) }
+                    debug_string: (len, ptr) => { console.log('wasm', readString(ptr, len)) }
                 },
                 wasi_snapshot_preview1: {
                     args_get: (count,bufsize) => { return 0 },
@@ -197,9 +180,7 @@ if (!self.window) (function() {
                     memory: exports.memory,
                     memmax: exports.memory.buffer.byteLength,
                     malloc: exports.mem_get,
-                    free: exports.mem_clr,
-                    set_debug: exports.set_debug,
-                    test_string: exports.test_string
+                    free: exports.mem_clr
                 };
                 wasm.shared = wasm.malloc(1024 * 1024 * 30),
                 wasm.fn = {
@@ -212,10 +193,6 @@ if (!self.window) (function() {
                     union: polyUnion,
                     offset: polyOffset
                 };
-                if (debug) {
-                    wasm.set_debug(1);
-                    runTests();
-                }
             });
     }
 
diff --git a/src/kiri/init.js b/src/kiri/init.js
index 64780eab..a418a940 100644
--- a/src/kiri/init.js
+++ b/src/kiri/init.js
@@ -2481,7 +2481,7 @@
             platform.update_size();
 
             // load wasm if indicated
-            KIRI.client.wasm(control.assembly);
+            KIRI.client.wasm(control.assembly === true);
         };
 
         UI.sync();
diff --git a/wasm/kiri-geo.cpp b/wasm/kiri-geo.cpp
index ad2e4dec..3b0fb26a 100644
--- a/wasm/kiri-geo.cpp
+++ b/wasm/kiri-geo.cpp
@@ -11,12 +11,9 @@ typedef int int32;
 using namespace ClipperLib;
 
 Uint8 *mem = 0;
-Uint8 debug = 0;
 
 extern "C" {
-    extern void polygon(Uint32 points, Uint32 inners);
-    extern void point(Uint32 x, Uint32 y);
-    extern void ostr(Uint32 len, std::string str);
+    extern void debug_string(Uint32 len, char *str);
 }
 
 struct length16 {
@@ -38,16 +35,23 @@ void mem_clr(Uint32 loc) {
     free((void *)loc);
 }
 
+void send_string(const char *format, ...) {
+    char buffer[100];
+    va_list args;
+    va_start(args, format);
+    Uint32 len =  vsprintf(buffer, format, args);
+    va_end(args);
+    debug_string(len, buffer);
+}
+
 Uint32 readPoly(Path &path, Uint32 pos) {
     struct length16 *ls = (struct length16 *)(mem + pos);
     Uint16 points = ls->length;
-    // if (debug) polygon(points, 0);
     pos += 2;
     while (points > 0) {
         struct point32 *ip = (struct point32 *)(mem + pos);
         pos += 8;
         path << IntPoint(ip->x, ip->y);
-        // if (debug) point(ip->x, ip->y);
         points--;
     }
     return pos;
@@ -64,12 +68,10 @@ Uint32 readPolys(Paths &paths, Uint32 pos, Uint32 count) {
 
 Uint32 writePolys(Paths &outs, Uint32 pos) {
     for (Path po : outs) {
-        // if (debug) polygon(po.size(), 1);
         struct length16 *ls = (struct length16 *)(mem + pos);
         ls->length = po.size();
         pos += 2;
         for (IntPoint pt : po) {
-            // if (debug) point(pt.X, pt.Y);
             struct point32 *ip = (struct point32 *)(mem + pos);
             ip->x = (int)pt.X;
             ip->y = (int)pt.Y;
@@ -84,7 +86,6 @@ Uint32 writePolys(Paths &outs, Uint32 pos) {
 
 __attribute__ ((export_name("poly_offset")))
 Uint32 poly_offset(Uint32 memat, Uint32 polys, float offset, float clean, Uint8 simple) {
-
     Paths ins(polys);
     Paths outs;
     Uint32 pos = memat;
@@ -186,17 +187,3 @@ Uint32 poly_diff(Uint32 memat, Uint32 polysA, Uint32 polysB, Uint8 AB, Uint8 BA,
 
     return resat;
 }
-
-__attribute__ ((export_name("set_debug")))
-void set_debug(Uint8 value) {
-    debug = value;
-}
-
-__attribute__ ((export_name("test_string")))
-void test_string(Uint8 value) {
-    // Creating a string from const char*
-    std::string str1 = "hello";
-    //std::string str1 = std::format("{} {}", "hello", value);
-
-    ostr(str1.length(), str1);
-}
diff --git a/wasm/kiri-geo.wasm b/wasm/kiri-geo.wasm
index 81158784..69946494 100755
Binary files a/wasm/kiri-geo.wasm and b/wasm/kiri-geo.wasm differ
diff --git a/wasm/makefile b/wasm/makefile
index 558c5987..75c49510 100644
--- a/wasm/makefile
+++ b/wasm/makefile
@@ -4,7 +4,7 @@ kiri-sla.wasm: kiri-sla.c
 	emcc --no-entry -o kiri-sla.wasm kiri-sla.c -O3 -s ERROR_ON_UNDEFINED_SYMBOLS=0
 
 kiri-geo.wasm: kiri-geo.cpp
-	emcc --no-entry -o kiri-geo.wasm clipper.cpp kiri-geo.cpp -Oz -s ERROR_ON_UNDEFINED_SYMBOLS=0 -s TOTAL_MEMORY=40mb -std=c++20
+	emcc --no-entry -o kiri-geo.wasm clipper.cpp kiri-geo.cpp -Oz -s ERROR_ON_UNDEFINED_SYMBOLS=0 -s TOTAL_MEMORY=40mb
 
 kiri-ani.wasm: kiri-ani.c
 	emcc --no-entry -o kiri-ani.wasm kiri-ani.c -O3 -s ERROR_ON_UNDEFINED_SYMBOLS=0