Re: function to check if a symbol in a library exists or not

From: Mike Pall <mike-1207@xxxxxxxxxx>
To: luajit@xxxxxxxxxxxxx
Date: Mon, 30 Jul 2012 18:11:46 +0200

Henk Boom wrote:
> In what cases are pcall/xpcall expensive or cheap?

Calling pcall/xpcall and returning from it with no error (true
return value) is very cheap and zero-cost if JIT-compiled.

Throwing an error is expensive (very expensive on some platforms).

--Mike

References:
- function to check if a symbol in a library exists or not
  - From: Cosmin Apreutesei
- Re: function to check if a symbol in a library exists or not
  - From: Justin Cormack
- Re: function to check if a symbol in a library exists or not
  - From: Henk Boom

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» function to check if a symbol in a library exists or not- Cosmin Apreutesei
» Re: function to check if a symbol in a library exists or not- Cosmin Apreutesei
» Re: function to check if a symbol in a library exists or not- Josh Simmons
» Re: function to check if a symbol in a library exists or not- Fjölnir Ásgeirsson
» Re: function to check if a symbol in a library exists or not- Justin Cormack
» Re: function to check if a symbol in a library exists or not- Cosmin Apreutesei
» Re: function to check if a symbol in a library exists or not- Cosmin Apreutesei
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