oehme commented on issue #243: [MNG-6633] - Reduce memory usage of excludes URL: https://github.com/apache/maven/pull/243#issuecomment-486401811 The object has a header of 12 bytes, plus 4 bytes for both fields, rounded up to multiples of 8 => 24 bytes per object. The string `commons-lang:commons-lang` has 25 characters, all LATIN-1, which on Java 9 and above is represented with 25 bytes (50 bytes on older Java versions). To that we need to add the array object header (12 bytes). We also have a String object wrapped around it, which has a reference to the char array (4 bytes) plus the `coder` field (4 bytes), plus the `hashCode` field (4 bytes) plus the object header (12 bytes) ==> 61 bytes for that String. It gets worse the longer a groupId/artifactId is. However, an even better solution would be to have a wrapper around the existing `Exclude` object. This is why I asked whether using a new class instead of the existing `ExcludeArtifactFilter` is an option (maybe @hboutemy can comment on that?). If we do that, we reduce the size per exclude to 16 bytes.
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