Add release configuration for maximum performance + native CPU features

Now that Sha1 is integrated, this seems in order ;)

Author: Byron

.cargo/config

@@ -0,0 +1 @@
+rustflags = "-C target-cpu=native"

Cargo.toml

@@ -18,7 +18,10 @@ anyhow = "1.0.31"
 structopt = "0.3.14"
 
 [profile.release]
-panic = 'unwind'
+overflow-checks = false
+lto = "fat"
+panic = 'abort'
+codegen-units = 1
 incremental = false
 
 [workspace]

demos/Cargo.toml

@@ -15,3 +15,11 @@ test = false
 git-odb = { version = "0.1.0", path = "../gitoxide-odb" }
 rayon = "1.3.0"
 anyhow = "1.0.31"
+
+[profile.release]
+overflow-checks = false
+lto = "fat"
+panic = 'abort'
+codegen-units = 1
+incremental = false
+