add 100k/1m uniform random benchmarks

diff --git a/bench/run.cpp b/bench/run.cpp
index 06ee8f1..d08a880 100644
--- a/bench/run.cpp
+++ b/bench/run.cpp

@@ -2,6 +2,20 @@
 #include <benchmark/benchmark.h>
 #include <delaunator.hpp>
 #include <string>
+#include <random>
+#include <vector>
+
+std::vector<double> generate_uniform(size_t n) {
+    std::vector<double> coords;
+    std::srand(350);
+
+    for (size_t i = 0; i < n; i++) {
+        coords.push_back(double(std::rand()) / RAND_MAX);
+        coords.push_back(double(std::rand()) / RAND_MAX);
+    }
+
+    return coords;
+}
 
 namespace {
 void BM_45K_geojson_nodes(benchmark::State& state) {
@@ -12,8 +26,24 @@
         delaunator::Delaunator delaunator(coords);
     }
 }
+
+void BM_100K_uniform(benchmark::State& state) {
+    std::vector<double> coords = generate_uniform(100000);
+    while (state.KeepRunning()) {
+        delaunator::Delaunator delaunator(coords);
+    }
+}
+
+void BM_1M_uniform(benchmark::State& state) {
+    std::vector<double> coords = generate_uniform(1000000);
+    while (state.KeepRunning()) {
+        delaunator::Delaunator delaunator(coords);
+    }
+}
 } // namespace
 
 BENCHMARK(BM_45K_geojson_nodes)->Unit(benchmark::kMillisecond);
+BENCHMARK(BM_100K_uniform)->Unit(benchmark::kMillisecond);
+BENCHMARK(BM_1M_uniform)->Unit(benchmark::kMillisecond);
 
 BENCHMARK_MAIN()