asp.net performance tips and tricks

ASP.NET Quick Wins20 Tips and Tricks To Shift Your Application into High Gear

Kevin Griffintwitter.com/1kevgriffkevin@kevgriffin.com

Hello!

Kevin GriffinIndependent ConsultantMicrosoft MVP, ASP.NET

kevin@kevgriffin.com

@1kevgriff

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Defining Performance

Performance is the amount

of time a person will wait

before getting pissed off.

Performance is sweating

because you have ONLY 16

cores and 32 gigs of RAM.

The Great Scale of Performance

Done before you ask Throw Computer Out the Window

The Great Scale of Performance

Done before you ask Throw Computer Out the Window

ASP.NET Application After File, NewGoogle

Visual Studio

Why

Performance?

3 Numbers to

Remember

100

milliseconds

1 second

10 seconds

Did you know: Google will

rank a slower loading

website below a faster one.

The number of mobile device

users is growing by the daily.

They hate slow websites.

Two simple rules for

better performance

Fewer

payloads

Faster

payloads

20 ASP.NET Quick

Wins

#1

Disable “debug”

mode

#2

Enable HTTP

Compression

What gets compressed?

• HTML

• JavaScript

• JSON

• CSS

• XML

• Non-compressed images (ico)

#3

Enable IIS

Auto-Start

Do you have a lot of

upfront loading and

configuration?

#4

Disable ViewState

Ways to Disable

• Control • Add EnableViewState=“false” to

control

• Page• Add EnableViewState=“false” to

the <%@ Page %> construct

• Application<configuration>

<system.web>

<pages enableViewState="false" />

</system.web>

</configuration>

• Machine<Machine.config >

<system.web>

<pages enableViewState="false" />

</system.web>

</Machine.config>

#5

STOP using

WebForms

I’m just kidding.

But seriously,

stop it.

#6

Disable

SessionState

Ways to Disable

• Application • Page

#7

Throw hardware at it!

Stop it!

Processors are

cheap.

RAM is cheap.

#8

Minify/Compress

JavaScript and CSS

#9

Output Cache

Caching Options

• Duration (in seconds)

• Location• Client

• Server

• Proxies

• VaryByParam

• VaryByHeader

• SqlDependency

#9b

Cache “look up”

tables

#10

Stop shipping the

kitchen sink

#11

Async

.NET Async Features

• Speeds up parallel processes

• Useful if your page needs to talk to several data sources

#12

CDNs and

Subdomains

CDNs and Subdomain

• Modern browsers limit downloads from a single domain.

http://assets.kevgriffin.com/images/2014/foo.png

could be better as

http://a1.assets.kevgriffin.com/images/2014/foo.png

#13

Glimpse

http://getglimpse.com

#14

Upgrade Your User

Experience

#15

ORM

Considerations

Test code-generated

“read” vs Stored

Procedures

Optimize for Ad Hoc

Queries

#16

Dispose SQL

Connections

Appropriately

#17

Hire a DBA to Optimize

Database Indexes and

Stored Procedures

Or if you must “do it yourself”

• Create indexes for columns used inside of:• WHERE clauses

• JOIN clauses

• ORDER BY clauses

• GROUP clauses

• TOP clauses

Or if you must “do it yourself”

• Don’t do SELECT *

#18

Consider Alternative

Data Stores

Alternatives

• MongoDB

• RavenDB

• Redis

• Azure Tables

#19

Embrace Workflow

Workflow

• Message-based workflows

• Examples: RabbitMQ, ZeroMQ, Azure Queues, etc

• Offload long running and critical tasking

• Example: Twitter, Amazon

#20

Hire Me

Kevin GriffinIndependent ConsultantMicrosoft MVP, ASP.NET

kevin@kevgriffin.com

@1kevgriff