diff --git a/libimagentryfilter/Cargo.toml b/libimagentryfilter/Cargo.toml
index f23a09b1..7ec3cb50 100644
--- a/libimagentryfilter/Cargo.toml
+++ b/libimagentryfilter/Cargo.toml
@@ -13,6 +13,9 @@ documentation = "https://matthiasbeyer.github.io/imag/imag_documentation/index.h
 repository    = "https://github.com/matthiasbeyer/imag"
 homepage      = "http://imag-pim.org"
 
+[profile.dev]
+codegen-units = 2
+
 [dependencies]
 clap = "2.*"
 filters = "0.1.*"