From 2be85fc62abf467286027018ef7869177155e4c8 Mon Sep 17 00:00:00 2001
From: ras44 <9282281+ras44@users.noreply.github.com>
Date: Fri, 3 May 2019 05:01:26 +0200
Subject: [PATCH] max_digits10 guarantees float decimal roundtrip (#4435)

2 additional digits are not needed to guarantee that casting the decimal representation will result in the same float, see https://github.com/dmlc/xgboost/issues/3980#issuecomment-458702440
---
 src/cli_main.cc | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/cli_main.cc b/src/cli_main.cc
index faa93ad2b..ccd675715 100644
--- a/src/cli_main.cc
+++ b/src/cli_main.cc
@@ -327,7 +327,7 @@ void CLIPredict(const CLIParam& param) {
       dmlc::Stream::Create(param.name_pred.c_str(), "w"));
   dmlc::ostream os(fo.get());
   for (bst_float p : preds.ConstHostVector()) {
-    os << std::setprecision(std::numeric_limits<bst_float>::max_digits10 + 2)
+    os << std::setprecision(std::numeric_limits<bst_float>::max_digits10)
        << p << '\n';
   }
   // force flush before fo destruct.