Merge branch 'speedups2'

1 files changed, 5 insertions, 1 deletions

diff --git a/src/fields/Doc.ts b/src/fields/Doc.ts
index 642becb46..c932259de 100644
--- a/src/fields/Doc.ts
+++ b/src/fields/Doc.ts
@@ -963,7 +963,11 @@ export namespace Doc {
         return Doc.NativeWidth(doc, dataDoc, useDim) / (Doc.NativeHeight(doc, dataDoc, useDim) || 1);
     }
     export function NativeWidth(doc?: Doc, dataDoc?: Doc, useWidth?: boolean) { return !doc ? 0 : NumCast(doc._nativeWidth, NumCast((dataDoc || doc)[Doc.LayoutFieldKey(doc) + "-nativeWidth"], useWidth ? doc[WidthSym]() : 0)); }
-    export function NativeHeight(doc?: Doc, dataDoc?: Doc, useHeight?: boolean) { return !doc ? 0 : NumCast(doc._nativeHeight, NumCast((dataDoc || doc)[Doc.LayoutFieldKey(doc) + "-nativeHeight"], useHeight ? doc[HeightSym]() : 0)); }
+    export function NativeHeight(doc?: Doc, dataDoc?: Doc, useHeight?: boolean) {
+        const dheight = doc ? NumCast((dataDoc || doc)[Doc.LayoutFieldKey(doc) + "-nativeHeight"], useHeight ? doc[HeightSym]() : 0) : 0;
+        const nheight = doc ? Doc.NativeWidth(doc, dataDoc, useHeight) * doc[HeightSym]() / doc[WidthSym]() : 0;
+        return !doc ? 0 : NumCast(doc._nativeHeight, nheight || dheight);
+    }
     export function SetNativeWidth(doc: Doc, width: number | undefined, fieldKey?: string) { doc[(fieldKey ?? Doc.LayoutFieldKey(doc)) + "-nativeWidth"] = width; }
     export function SetNativeHeight(doc: Doc, height: number | undefined, fieldKey?: string) { doc[(fieldKey ?? Doc.LayoutFieldKey(doc)) + "-nativeHeight"] = height; }