Lower quadratic iteration count in an elias-fano test

Summary: [Folly] Lower quadratic iteration count in an elias-fano test to make it take less wall time to run.

Reviewed By: philippv

Differential Revision: D14821341

fbshipit-source-id: 726fe5bd17442661196593ea6279314509622832

folly/experimental/test/EliasFanoCodingTest.cpp

@@ -43,7 +43,7 @@ uint8_t slowDefaultNumLowerBits(size_t upperBound, size_t size) {
 TEST(EliasFanoCoding, defaultNumLowerBits) {
   // Verify that slowDefaultNumLowerBits and optimized
   // Encoder::defaultNumLowerBits agree.
-  static constexpr size_t kNumIterations = 2500;
+  static constexpr size_t kNumIterations = 750;
   auto compare = [](size_t upperBound, size_t size) {
     using Encoder = EliasFanoEncoderV2<size_t>;
     EXPECT_EQ(