https://issues.dlang.org/show_bug.cgi?id=17577
--- Comment #2 from Jon Degenhardt <jrdemail2000-dl...@yahoo.com> --- (In reply to Vladimir Panteleev from comment #1) > Reproducible on Linux x86_64 (11.6 / 10.6 seconds with dmd) > > (In reply to Jon Degenhardt from comment #0) > > Implication so far is that > > something is interfering with proper inlining. > > [...] > > $ ldc2 -release -O3 -boundscheck=off -singleobj use_conv_to.d > > $ dmd -release -O -boundscheck=off use_conv_to.d > > This command line does not include -inline. Nice catch. I'll add -inline to the DMD command lines and retry. (It doesn't apply to the LDC command line.) Thanks! --