From 31a29d03784b49183df31debedcbf26a1a33148d Mon Sep 17 00:00:00 2001
From: xinhuitian <xinhui_tian@126.com>
Date: Fri, 2 Feb 2024 02:31:57 -0800
Subject: [PATCH] HNSW search use efSearch from params if provided (#3233)

Summary:
I found that HNSW search method uses its own efSearch to create candidates, which should be got from params if provided I think?

Pull Request resolved: https://github.com/facebookresearch/faiss/pull/3233

Reviewed By: algoriddle

Differential Revision: D53342879

Pulled By: mdouze

fbshipit-source-id: 4f47f19d3673d1bb8d7e8e82745f9e5c1b9afb42
---
 faiss/impl/HNSW.cpp | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/faiss/impl/HNSW.cpp b/faiss/impl/HNSW.cpp
index fb4de67899..a9fb9daf5b 100644
--- a/faiss/impl/HNSW.cpp
+++ b/faiss/impl/HNSW.cpp
@@ -829,7 +829,7 @@ HNSWStats HNSW::search(
             greedy_update_nearest(*this, qdis, level, nearest, d_nearest);
         }
 
-        int ef = std::max(efSearch, k);
+        int ef = std::max(params ? params->efSearch : efSearch, k);
         if (search_bounded_queue) { // this is the most common branch
             MinimaxHeap candidates(ef);