From c558ff0e6d8f115a358df433a7789d457a808d38 Mon Sep 17 00:00:00 2001
From: Tomasz Kramkowski <tomasz@kramkow.ski>
Date: Mon, 2 Nov 2026 21:48:27 +0000
Subject: Perf improvement hlvr patch

---
 hlvr/patch-hlvr | 27 +++++++++++++++++++++++++++
 1 file changed, 27 insertions(+)

(limited to 'hlvr')

diff --git a/hlvr/patch-hlvr b/hlvr/patch-hlvr
index 5339157..d7b8d9d 100755
--- a/hlvr/patch-hlvr
+++ b/hlvr/patch-hlvr
@@ -69,6 +69,33 @@ def patch(
 
 
 PATCHES = {
+    "game/bin/linuxsteamrt64/librendersystemvulkan.so": patch(
+        "dc034f6b5d2116393bfead77f3265c124687b76766906c53a077c196b21ffa18",
+        "7a52bda8f4e6cc35e5ed46f181c3847400807704cab3fea38b40154d0b977f03",
+        (
+            # The renderer keeps a pool of "staging" buffers that it uses to
+            # upload data to the GPU. When this pool exceeds 128MiB
+            # (configurable via RenderSystem.VulkanStagingPMBSizeLimitMB in
+            # "gameinfo.gi") of allocations, it will clear it down almost
+            # completely. This can take a good 30+ms which makes for a pretty
+            # unacceptable stutter. There's no need to clear all of it at once.
+            # This patch stops clearing when one staging buffer has been freed.
+            (0x22545D, "eb7b90"),
+            # When trying to re-use a staging buffer, the renderer only looks
+            # at two candidate buffers, and allocates (potentially triggering
+            # the de-allocation above) otherwise. Searching all the buffers
+            # seems fast enough and avoids constant allocation and
+            # de-allocation which seems slower. These patches implement that
+            # search.
+            (0x225B99, "0c496bc4504c8bb403980600004d89f290"),
+            (0x225BB8, "68"),
+            (0x225BC5, "5b"),
+            (
+                0x225C21,
+                "4183fc0675194d8b76104d85f675074c8bb3780800004d39d60f856affffff4531ffebb1",
+            ),
+        ),
+    ),
     "game/bin/linuxsteamrt64/libscenesystem.so": patch(
         "6d395e42a86d352eed03a794bb877f3fd21e84d4be494daa309ad986208e5c48",
         "7e47f2c0ba97e60cbedcb154df4017feaf04ad1d2528b942f46da15b7303bbc6",
-- 
cgit v1.3.1