diff --git a/Cargo.toml b/Cargo.toml
index 1522a6d..971b5a0 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -29,6 +29,7 @@ defmt-info = []
 defmt-warn = []
 defmt-error = []
 
+# cargo build/run
 [profile.dev]
 codegen-units = 1
 debug = 2
@@ -37,13 +38,14 @@ incremental = false
 opt-level = 3
 overflow-checks = true
 
+# cargo build/run --release
 [profile.release]
 codegen-units = 1
 debug = 2
 debug-assertions = false
 incremental = false
-lto = "fat"
-opt-level = 's'
+lto = 'fat'
+opt-level = 3
 overflow-checks = false
 
 # do not optimize proc-macro crates = faster builds from scratch
@@ -60,3 +62,21 @@ debug = false
 debug-assertions = false
 opt-level = 0
 overflow-checks = false
+
+# cargo test
+[profile.test]
+codegen-units = 1
+debug = 2
+debug-assertions = true
+incremental = false
+opt-level = 3
+overflow-checks = true
+
+# cargo test --release
+[profile.bench]
+codegen-units = 1
+debug = 2
+debug-assertions = false
+incremental = false
+lto = 'fat'
+opt-level = 3