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Re: Basic auth is slow

Maxim Dounin
November 30, 2015 08:14AM

On Sat, Nov 28, 2015 at 06:18:54PM +0100, Joó Ádám wrote:

> Hi,
> I just noticed that enabling basic authentication adds between 100 and
> 150 ms to my otherwise 30-40 ms page load time. Is this known
> behaviour? Is this somehow inherent or a design / implementation
> mistake?

Basic authentication checks user password on each request.
Depending on a password hash used for a particular user in the
user file, it may take significant time - as password hashes
are designed to be CPU-intensive to prevent password recovery
attacks. Some additional information can be found here:


Depending on your particular setup and possible risks, you may
consider using something less CPU-intensive as your password hash
function if a hash calculation takes 100ms. All crypt(3) schemes
as supported by your system are understood by nginx, as well as
some additional schemes for portability and debugging. See here
for more details:


Maxim Dounin

nginx mailing list
Subject Author Posted

Basic auth is slow

Joó Ádám November 28, 2015 12:20PM

Re: Basic auth is slow

Maxim Dounin November 30, 2015 08:14AM

Re: Basic auth is slow

Joó Ádám November 30, 2015 05:04PM

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