From d27f69308348cc46c651c38bea0a16a5c4c84925 Mon Sep 17 00:00:00 2001
From: Marcus Holland-Moritz <github@mhxnet.de>
Date: Thu, 10 Dec 2020 21:50:10 +0100
Subject: [PATCH] Default to best possible compression for block compressor

---
 src/dwarfs/block_compressor.cpp | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/src/dwarfs/block_compressor.cpp b/src/dwarfs/block_compressor.cpp
index 5e9c26c6..64cfbbc9 100644
--- a/src/dwarfs/block_compressor.cpp
+++ b/src/dwarfs/block_compressor.cpp
@@ -466,11 +466,12 @@ block_compressor::block_compressor(const std::string& spec, size_t block_size) {
     impl_ = std::make_unique<lz4_block_compressor<lz4_compression_policy>>();
   } else if (om.choice() == "lz4hc") {
     impl_ = std::make_unique<lz4_block_compressor<lz4hc_compression_policy>>(
-        om.get<int>("level", 0));
+        om.get<int>("level", 9));
 #endif
 #ifdef DWARFS_HAVE_LIBZSTD
   } else if (om.choice() == "zstd") {
-    impl_ = std::make_unique<zstd_block_compressor>(om.get<int>("level", 1));
+    impl_ = std::make_unique<zstd_block_compressor>(
+        om.get<int>("level", ZSTD_maxCLevel()));
 #endif
   } else {
     throw std::runtime_error("unknown compression: " + om.choice());