From de1adee9f61d582db722d6d842038b89d3375c89 Mon Sep 17 00:00:00 2001
From: Siarhei Fedartsou <siarhei.fedartsou@gmail.com>
Date: Wed, 19 Jun 2024 19:11:29 +0200
Subject: [PATCH] wip

---
 src/benchmarks/bench.cpp | 18 ++++++++++++++++--
 1 file changed, 16 insertions(+), 2 deletions(-)

diff --git a/src/benchmarks/bench.cpp b/src/benchmarks/bench.cpp
index 6cc42768b..58df8e070 100644
--- a/src/benchmarks/bench.cpp
+++ b/src/benchmarks/bench.cpp
@@ -105,12 +105,26 @@ class GPSTraces
         return coordinates[dis(gen)];
     }
 
-    const std::vector<osrm::util::Coordinate> &getRandomTrace() const
+    std::vector<osrm::util::Coordinate> getRandomTrace() const
     {
         std::uniform_int_distribution<> dis(0, trackIDs.size() - 1);
         auto it = trackIDs.begin();
         std::advance(it, dis(gen));
-        return traces.at(*it);
+
+        const auto &trace = traces.at(*it);
+
+        std::uniform_int_distribution<> length_dis(50, 100);
+        size_t length = length_dis(gen);
+        if (trace.size() <= length + 1)
+        {
+            return trace;
+        }
+
+        std::uniform_int_distribution<> start_dis(0, trace.size() - length - 1);
+        size_t start_index = start_dis(gen);
+
+        return std::vector<osrm::util::Coordinate>(trace.begin() + start_index,
+                                                   trace.begin() + start_index + length);
     }
 };