avoid re-computing the facet scales

Author: Fil

src/options.js

@@ -48,7 +48,6 @@ export const indexOf = (d, i) => i;
 export const identity = {transform: (d) => d};
 export const zero = () => 0;
 export const one = () => 1;
-export const yes = () => true;
 export const string = (x) => (x == null ? x : `${x}`);
 export const number = (x) => (x == null ? x : +x);
 export const boolean = (x) => (x == null ? x : !!x);

src/plot.js

@@ -6,7 +6,7 @@ import {defined} from "./defined.js";
 import {Dimensions} from "./dimensions.js";
 import {facetTranslate, filterFacets, maybeFacet, facetReindex} from "./facet.js";
 import {Legends, exposeLegends} from "./legends.js";
-import {arrayify, isDomainSort, isScaleOptions, map, maybeNamed, range, where, yes} from "./options.js";
+import {arrayify, isDomainSort, isScaleOptions, map, maybeNamed, range, where} from "./options.js";
 import {Scales, ScaleFunctions, autoScaleRange, exposeScales} from "./scales.js";
 import {position, registry as scaleRegistry} from "./scales/index.js";
 import {applyInlineStyles, maybeClassName, maybeClip, styles} from "./style.js";
@@ -514,7 +514,10 @@ export function plot(options = {}) {
   }
 
   // Initalize the scales and axes.
-  const scaleDescriptors = Scales(addScaleChannels(channelsByScale, stateByMark), options);
+  const scaleDescriptors = Scales(
+    addScaleChannels(channelsByScale, stateByMark, (scale) => !["fx", "fy"].includes(scale)),
+    options
+  );
   const scales = ScaleFunctions(scaleDescriptors);
   const axes = Axes(scaleDescriptors, options);
   const dimensions = Dimensions(scaleDescriptors, axes, options);
@@ -848,7 +851,7 @@ function inferChannelScale(channels) {
   }
 }
 
-function addScaleChannels(channelsByScale, stateByMark, filter = yes) {
+function addScaleChannels(channelsByScale, stateByMark, filter) {
   for (const {channels} of stateByMark.values()) {
     for (const name in channels) {
       const channel = channels[name];