In lower-level imperative languages such as C and Fortran it is typically a 10 20 % speed boost, with minor impact on code size, while in more abstract languages it can be significantly more important, due to the number of layers inlining removes, with an extreme example being Self, where one compiler saw improvement factors of 4 to 55 by inlining.
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Poems are more concentrated or " closely " organized than prose in that they tend to present concentrated, sharper selected details in a concentrated, carefully arranged way, giving them more " intensity . " By presenting concrete, explicit statements ( as in " The Wife of Usher's Well " ), the poet can convey an emotional impact as well as information, which more abstract language can't do.