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| -rw-r--r-- | src/doc/trpl/static-and-dynamic-dispatch.md | 9 |
1 files changed, 5 insertions, 4 deletions
diff --git a/src/doc/trpl/static-and-dynamic-dispatch.md b/src/doc/trpl/static-and-dynamic-dispatch.md index 98dac9bf84b..1baf41329f5 100644 --- a/src/doc/trpl/static-and-dynamic-dispatch.md +++ b/src/doc/trpl/static-and-dynamic-dispatch.md @@ -79,10 +79,11 @@ fn main() { } ``` -This has some upsides: static dispatching of any method calls, allowing for -inlining and hence usually higher performance. It also has some downsides: -causing code bloat due to many copies of the same function existing in the -binary, one for each type. +This has a great upside: static dispatch allows function calls to be +inlined because the callee is known at compile time, and inlining is +the key to good optimization. Static dispatch is fast, but it comes at +a tradeoff: 'code bloat', due to many copies of the same function +existing in the binary, one for each type. Furthermore, compilers aren’t perfect and may “optimize” code to become slower. For example, functions inlined too eagerly will bloat the instruction cache |