From e3cadcdbc6ee4d4ad7712f16b58287a3c1e182b4 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Ga=C3=ABl=20C?= <gael-de-sailly@netc.eu>
Date: Mon, 26 Jul 2021 22:28:45 +0200
Subject: [PATCH] Collect garbage during pre-generation to free some space and
 reduce OOM problems

---
 pregenerate.lua | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/pregenerate.lua b/pregenerate.lua
index d455782..af302e1 100644
--- a/pregenerate.lua
+++ b/pregenerate.lua
@@ -31,6 +31,7 @@ local function pregenerate(keep_loaded)
 	local ref_dem = model:define_isostasy(dem)
 
 	local tectonic_step = tectonic_speed * time_step
+	collectgarbage()
 	for i=1, niter do
 		print("[mapgen_rivers] Iteration " .. i .. " of " .. niter)
 
@@ -43,6 +44,8 @@ local function pregenerate(keep_loaded)
 			end
 			model:isostasy()
 		end
+
+		collectgarbage()
 	end
 	model:flow()
 
@@ -72,6 +75,7 @@ local function pregenerate(keep_loaded)
 		grid.offset_x = offset_x
 		grid.offset_y = offset_y
 	end
+	collectgarbage()
 end
 
 return pregenerate