message: OMVDecoderPerformanceTest - added sphere projection tests.
diff: import { assert } from "chai";
  -import { getProjection, Theme } from "@here/harp-datasource-protocol";
  +import { Theme } from "@here/harp-datasource-protocol";
  import { StyleSetEvaluator } from "@here/harp-datasource-protocol/index-decoder";
  import { accessToken } from "@here/harp-examples/config";
  -import { TileKey } from "@here/harp-geoutils";
  +import { sphereProjection, TileKey, webMercatorProjection } from "@here/harp-geoutils";
  import { ThemeLoader } from "@here/harp-mapview";
  import { APIFormat, OmvRestClient, OmvRestClientParameters } from "@here/harp-omv-datasource";
  import { OmvDecoder } from "@here/harp-omv-datasource/lib/OmvDecoder";
  @@ -63,7 +63,6 @@ export function createOMVDecoderPerformanceTest(
  let omvTiles: Array<[TileKey, ArrayBuffer]>;
  let theme: Theme;
  - const counterName = `OMVDecoderPerformanceTest-${name}`;
  before(async function() {
  this.timeout(10000);
  const omvDataProvider = new OmvRestClient(options.omvRestClientOptions);
  @@ -84,9 +83,31 @@ export function createOMVDecoderPerformanceTest(
  assert.isArray(theme.styles![styleSetName]);
  });
  - it(`measure decode time`, async () => {
  + it(`measure decode time - webMercator`, async () => {
  + const counterName = `OMVDecoderPerformanceTest-${name} webMercator`;
  this.timeout(0);
  - const projection = getProjection("mercator");
  +
  + const projection = webMercatorProjection;
  +
  + const styleSetEvaluator = new StyleSetEvaluator(
  + theme.styles![styleSetName],
  + theme.definitions
  + );
  +
  + await measurePerformanceSync(counterName, repeats, function() {
  + for (const [tileKey, tileData] of omvTiles) {
  + const decoder = new OmvDecoder(projection, styleSetEvaluator, false);
  + decoder.getDecodedTile(tileKey, tileData);
  + }
  + });
  + });
  +
  + it(`measure decode time - sphereProjection`, async () => {
  + this.timeout(0);
  +
  + const counterName = `OMVDecoderPerformanceTest-${name} sphere`;
  +
  + const projection = sphereProjection;
  const styleSetEvaluator = new StyleSetEvaluator(
  theme.styles![styleSetName],
  