[ CB ] Return only N results from read_all (#678)

CVS-146801

src/cpp/src/continuous_batching_impl.cpp

@@ -314,13 +314,7 @@ ContinuousBatchingPipeline::ContinuousBatchingImpl::generate(const std::vector<o
         EncodedGenerationResult result;
         result.m_request_id = 1;
         std::vector<GenerationOutput> generation_outputs = generation->read_all();
-        std::sort(generation_outputs.begin(), generation_outputs.end(), [=] (GenerationOutput& r1, GenerationOutput& r2) {
-            return r1.score > r2.score;
-        });
-
-        auto num_outputs = std::min(sampling_params[generation_idx].num_return_sequences, generation_outputs.size());
-        for (size_t generation_output_idx = 0; generation_output_idx < num_outputs; ++generation_output_idx) {
-            const auto& generation_output = generation_outputs[generation_output_idx];
+        for (const auto& generation_output : generation_outputs) {
             result.m_generation_ids.push_back(std::move(generation_output.generated_ids));
             result.m_scores.push_back(generation_output.score);
         }

src/cpp/src/generation_handle.cpp

@@ -67,8 +67,10 @@ std::vector<GenerationOutput> GenerationHandleImpl::read_all() {
         add_partial_result(partial_results, iteration_results);
     }
 
-    for (auto& partial_result: partial_results) {
+    for (auto& partial_result : partial_results) {
         results.push_back(partial_result.second);
     }
+    std::sort(results.begin(), results.end(), [](const GenerationOutput& lhs, const GenerationOutput& rhs) { return lhs.score > rhs.score; });
+    results.resize(std::min(m_sampling_params.num_return_sequences, results.size()));
     return results;
 }