From 0401de4b6838e7a9b24ae7bc0252b5ba30993791 Mon Sep 17 00:00:00 2001
From: leejet <leejet714@gmail.com>
Date: Tue, 27 Oct 2026 00:16:55 +0800
Subject: [PATCH] fix: avoid repeated seeks when skipping small GGUF metadata
 values

---
 src/model_io/gguf_reader_ext.h | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/src/model_io/gguf_reader_ext.h b/src/model_io/gguf_reader_ext.h
index f02fe3c6f4..bf183f7488 100644
--- a/src/model_io/gguf_reader_ext.h
+++ b/src/model_io/gguf_reader_ext.h
@@ -60,7 +60,12 @@ class GGUFReader {
         if (count > remaining_bytes_ / element_size)
             return false;
         uint64_t size = count * element_size;
-        fin.seekg(static_cast<std::streamoff>(size), std::ios::cur);
+        // Seeking discards the read buffer, making arrays of short tokenizer strings expensive to skip.
+        if (size <= 64 * 1024) {
+            fin.ignore(static_cast<std::streamsize>(size));
+        } else {
+            fin.seekg(static_cast<std::streamoff>(size), std::ios::cur);
+        }
         if (!fin.good())
             return false;
         remaining_bytes_ -= size;