From a70b93fd016adb557d55db771fac488be20e8ff1 Mon Sep 17 00:00:00 2001
From: Anton Khirnov <anton@khirnov.net>
Date: Wed, 1 Aug 2018 17:03:52 +0200
Subject: Use a more efficient relaxation factor.

---
 ell_relax.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/ell_relax.c b/ell_relax.c
index f51c671..ffc4522 100644
--- a/ell_relax.c
+++ b/ell_relax.c
@@ -171,7 +171,7 @@ static void boundaries_apply(EllRelaxContext *ctx)
 int mg2di_ell_relax_step(EllRelaxContext *ctx)
 {
     EllRelaxInternal *priv = ctx->priv;
-    const double cfl_fac = (1.0 / 4.0) * ctx->step[0] * ctx->step[1];
+    const double cfl_fac = (1.0 / 5.0) * ctx->step[0] * ctx->step[1];
 
     for (int idx1 = 0; idx1 < ctx->domain_size[1]; idx1++)
         for (int idx0 = 0; idx0 < ctx->domain_size[0]; idx0++) {
-- 
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