Faster Dlang Execution

[H. S. Teoh]

On Tue, Jun 08, 2021 at 05:10:47PM +0000, seany via Digitalmars-d-learn wrote:
[...]
> Profiling doesn't help, because different input is causing different
> parts of the program to become slow.
[...]

Do you have any more specific information about what kind of inputs
cause which parts of the program to slow down?  Without more details
it's hard to say what the problem is.

But I'd say, if you care about performance you should fix *all* of the
slow parts that your profiler finds.

There are some performance best practices that you should follow, such
as reduce frequent GC allocations, avoid expensive algorithms (like
O(n^2) or worse) where possible, avoid excessive copying of data,
perform I/O in larger blocks instead of small bits at a time, avoid
excessive indirection (final methods where they don't need to be
virtual, by-value types instead of deep dereferencing, etc.), cache
frequently-computed results, etc..

But more importantly, if you can elaborate a bit more on what your
program is trying to do, it would help us give more specific
recommendations. There may be domain-specific optimizations that you
could apply as well.


T

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