diff --git a/lib/_emerge/depgraph.py b/lib/_emerge/depgraph.py
index ddef7bb0a1..a6e63c058c 100644
--- a/lib/_emerge/depgraph.py
+++ b/lib/_emerge/depgraph.py
@@ -62,6 +62,7 @@
 from portage.util.digraph import digraph
 from portage.util.futures import asyncio
 from portage.util._async.TaskScheduler import TaskScheduler
+from portage.util.portage_lru_cache import show_lru_cache_info
 from portage.versions import _pkg_str, catpkgsplit
 from portage.binpkg import get_binpkg_format
 
@@ -11800,6 +11801,7 @@ def _spinner_stop(spinner, backtracked: int = -1, max_retries: int = -1):
     portage.writemsg_stdout(
         f"Dependency resolution took {darkgreen(time_fmt)} s{backtrack_info}.\n\n"
     )
+    show_lru_cache_info()
 
 
 def backtrack_depgraph(
diff --git a/lib/_emerge/post_emerge.py b/lib/_emerge/post_emerge.py
index 6f1f1c243d..06fb8d1784 100644
--- a/lib/_emerge/post_emerge.py
+++ b/lib/_emerge/post_emerge.py
@@ -11,6 +11,7 @@
 from portage.output import colorize
 from portage.util._dyn_libs.display_preserved_libs import display_preserved_libs
 from portage.util._info_files import chk_updated_info_files
+from portage.util.portage_lru_cache import show_lru_cache_info
 
 from .chk_updated_cfg_files import chk_updated_cfg_files
 from .emergelog import emergelog
@@ -169,3 +170,5 @@ def post_emerge(myaction, myopts, myfiles, target_root, trees, mtimedb, retval):
 
     if "--quiet" not in myopts and myaction is None and "@world" in myfiles:
         show_depclean_suggestion()
+
+    show_lru_cache_info()
diff --git a/lib/portage/process.py b/lib/portage/process.py
index 3f2c48e927..d252cc7c4a 100644
--- a/lib/portage/process.py
+++ b/lib/portage/process.py
@@ -323,17 +323,19 @@ class EnvStats:
     env_largest_size: int
 
 
+@lru_cache(1024)
+def _encoded_length(s):
+    return len(os.fsencode(s))
+
+
 def calc_env_stats(env) -> EnvStats:
-    @lru_cache(1024)
-    def encoded_length(s):
-        return len(os.fsencode(s))
 
     env_size = 0
     env_largest_name = None
     env_largest_size = 0
     for env_name, env_value in env.items():
-        env_name_size = encoded_length(env_name)
-        env_value_size = encoded_length(env_value)
+        env_name_size = _encoded_length(env_name)
+        env_value_size = _encoded_length(env_value)
         # Add two for '=' and the terminating null byte.
         total_size = env_name_size + env_value_size + 2
         if total_size > env_largest_size:
diff --git a/lib/portage/util/meson.build b/lib/portage/util/meson.build
index 8a60617d6f..fed09e20df 100644
--- a/lib/portage/util/meson.build
+++ b/lib/portage/util/meson.build
@@ -21,6 +21,7 @@ py.install_sources(
         'mtimedb.py',
         'netlink.py',
         'path.py',
+        'portage_lru_cache.py',
         'shelve.py',
         'socks5.py',
         'whirlpool.py',
diff --git a/lib/portage/util/portage_lru_cache.py b/lib/portage/util/portage_lru_cache.py
new file mode 100644
index 0000000000..4b02cbee04
--- /dev/null
+++ b/lib/portage/util/portage_lru_cache.py
@@ -0,0 +1,42 @@
+# Copyright 2025 Gentoo Authors
+# Distributed under the terms of the GNU General Public License v2
+
+import os
+import portage
+
+
+def show_lru_cache_info():
+    if not os.environ.get("PORTAGE_SHOW_LRU_CACHE_INFO"):
+        return
+
+    portage_lru_caches = {
+        portage.dep._use_reduce_cached: "use_reduce_cached",
+        portage.process._encoded_length: "encoded_length",
+        portage.versions.vercmp: "vercmp",
+        portage.versions.catpkgsplit: "catpkgsplit",
+        portage.eapi._get_eapi_attrs: "get_eapi_attrs",
+    }
+
+    print("Portage @lru_cache information")
+    for method, name in portage_lru_caches.items():
+        cache_info = method.cache_info()
+
+        hits = cache_info.hits
+        misses = cache_info.misses
+        maxsize = cache_info.maxsize
+        currsize = cache_info.currsize
+
+        total = hits + misses
+        if total:
+            hitratio = hits / total
+        else:
+            hitratio = 0
+
+        if maxsize:
+            utilization = currsize / maxsize
+        else:
+            utilization = 0
+
+        pretty_cache_info = f"hit ratio: {hitratio:.2%} (total: {total}, hits: {hits}, misses: {misses}) util: {utilization:.2%} ({maxsize} / {currsize})"
+
+        print(f"{name}: {pretty_cache_info}")