use double for emscripten_get_now, to not lose precision from performance.now etc.

2 files changed, 4 insertions, 4 deletions

diff --git a/system/include/emscripten/emscripten.h b/system/include/emscripten/emscripten.h
index d30620ec..dd1e01a4 100644
--- a/system/include/emscripten/emscripten.h
+++ b/system/include/emscripten/emscripten.h
@@ -203,7 +203,7 @@ void emscripten_get_canvas_size(int *width, int *height, int *isFullscreen);
  * absolute time, and is only meaningful in comparison to
  * other calls to this function. The unit is ms.
  */
-float emscripten_get_now();
+double emscripten_get_now();
 
 /*
  * Simple random number generation in [0, 1), maps to Math.random().
diff --git a/tests/emscripten_get_now.cpp b/tests/emscripten_get_now.cpp
index 17aa7d32..5ededb23 100644
--- a/tests/emscripten_get_now.cpp
+++ b/tests/emscripten_get_now.cpp
@@ -14,10 +14,10 @@ int main() {
   // b) Values returned by emscripten_get_now() are strictly nondecreasing.
   // c) emscripten_get_now() is able to return sub-millisecond precision timer values.
   bool detected_good_timer_precision = false;
-  float smallest_delta = 0.f;
+  double smallest_delta = 0.f;
   for(int x = 0; x < 1000; ++x) { // Have several attempts to find a good small delta, i.e. give time to JS engine to warm up the code and so on.
-    float t = emscripten_get_now();
-    float t2 = emscripten_get_now();
+    double t = emscripten_get_now();
+    double t2 = emscripten_get_now();
     for(int i = 0; i < 100 && t == t2; ++i) {
       t2 = emscripten_get_now();
     }