[core] Add batch conversion of latLngs to/from screenCoords (#15891)

* [core] Add batch conversion of latLng vs screenCoord

* [core] Take the simple approach

benchmark/api/query.benchmark.cpp

@@ -38,6 +38,30 @@ public:
 
 } // end namespace
 
+static void API_queryPixelsForLatLngs(::benchmark::State& state) {
+    std::vector<LatLng> points;
+    int count = 10000;
+    for (int i = 0; i < count; ++i) {
+        points.emplace_back(1, 1);
+    }
+    QueryBenchmark bench;
+    while (state.KeepRunning()) {
+        (void)bench.map.pixelsForLatLngs(points);
+    }
+}
+
+static void API_queryLatLngsForPixels(::benchmark::State& state) {
+    std::vector<ScreenCoordinate> points;
+    int count = 10000;
+    for (int i = 0; i < count; ++i) {
+        points.emplace_back(1, 1);
+    }
+    QueryBenchmark bench;
+    while (state.KeepRunning()) {
+        (void)bench.map.latLngsForPixels(points);
+    }
+}
+
 static void API_queryRenderedFeaturesAll(::benchmark::State& state) {
     QueryBenchmark bench;
 
@@ -61,7 +85,8 @@ static void API_queryRenderedFeaturesLayerFromHighDensity(::benchmark::State& st
         bench.frontend.getRenderer()->queryRenderedFeatures(bench.box, {{{"road-street" }}, {}});
     }
 }
-
+BENCHMARK(API_queryPixelsForLatLngs);
+BENCHMARK(API_queryLatLngsForPixels);
 BENCHMARK(API_queryRenderedFeaturesAll);
 BENCHMARK(API_queryRenderedFeaturesLayerFromLowDensity);
 BENCHMARK(API_queryRenderedFeaturesLayerFromHighDensity);