Developer insight into why applications run amazingly Fast in CF 2018

© 2018 Adobe Systems Incorporated. All Rights Reserved. Adobe Confidential.© 2018 Adobe Systems Incorporated. All Rights Reserved. Adobe Confidential.
Developer insight
into why applications
run amazingly Fast in
CF 2018
SV Pavan Kumar | Engineer | sanniset@adobe.com

© 2018 Adobe Systems Incorporated. All Rights Reserved. Adobe Confidential.
Adobe ColdFusion & API Manager ProductTeam
Security Czar for ColdFusionTeam
Experienced Java Developer
Former Developer at RSA Security
About Me
Email: sanniset@adobe.com

Just by migrating CF to 2018
ColdFusion 2016 ColdFusion 11

4

Performance
5
ColdFusion Performance

Performance
6

© 2018 Adobe Systems Incorporated. All Rights Reserved. Adobe Confidential. 7
CF Engine
Language
Core
Runtime
Functions Tags
Performance

In a split second
Finding an element in the list (listContainsLasvegas)
Tokyo, Lasvegas, Bangkok, NewYork, Jakarta, Bangalore
8
Creates an array of Strings
Tokyo BangkokLasvegas NewYork Jakarta Bangalore
Linearly check each String for equality
CF 2016
List Item# 1
Lasvegas

© 2018 Adobe Systems Incorporated. All Rights Reserved. Adobe Confidential. 9
Result
True
Lasvegas
Finding an element in the list (listContainsLasvegas)
Tokyo BangkokLasvegas NewYork Jakarta Bangalore
Linearly check each String for equality
CF 2016
List Item# 2
In a split second

• Finding an element in the list (listContainsLasvegas)
Tokyo, Lasvegas, Bangkok,NewYork, Jakarta, Bangalore
Lasvegas
10
CF 2018
Character by Character ScanList Item# 1
Move the pointer till delimiter is found
In a split second

• Finding an element in the list (listContainsLasvegas)
Tokyo, Lasvegas, Bangkok,NewYork, Jakarta, Bangalore
Lasvegas
11
CF 2018
Character by Character ScanList Item# 2
Result
true
 Intermediate Array of Strings generation is avoided
In a split second

• Finding an element in the list (listInsertAt 3London)
Tokyo, Lavagas, Bangkok, NewYork, Jakarta, Bangalore
12
Tokyo BangkokLasVegas NewYork Jakarta Bangalore
Insert London at the position 3
Tokyo BangkokLasVegas NewYork Jakarta BangaloreLondon
Concatenate Array Of Strings to List
Tokyo, Lasvegas, London, Bangkok, NewYork, Jakarta,
Bangalore
CF 2016In a split second

• Finding an element in the list (listInsertAt 3London)
13
CF 2018
Char by Char scan and Find (Position – 1 ) Delimiter
Tokyo, Lasvegas,
Prefix
London
ValueTo Insert Delimiter
Bangkok, NewYork, Jakarta, Bangalore
Suffix
,
Concat(prefix, value to insert, delimiter, suffix)
Tokyo,Lasvegas,London,Bangkok,NewYork, Jakarta,
Bangalore
In a split second

14
CF 2018
 Intermediate Array of Strings generation is avoided
 Reduced the number of concatenations
In a split second

15

The wizard of RegEx
16

Matchmaking
17
CF 2016
<([A-Z][A-Z0-9]*)b[^>]*>(.*?)</1>
<TAG>one<TAG>two</TAG>one</TAG>
CF RegEx Engine
Compile Regular
Expression
Match the Input
with RegEx
Return
True/False

18
CF 2016
<([A-Z][A-Z0-9]*)b[^>]*>(.*?)</1>
CF RegEx Engine
Compile Regular
Expression
Match the Input
with RegEx
Return
True/False
Matchmaking

19
CF 2018
<([A-Z][A-Z0-9]*)b[^>]*>(.*?)</1>
CF RegEx Engine
Get Compiled
RegEx
Lookup RegEx
Cache
Matchmaking

20
CF 2018
<([A-Z][A-Z0-9]*)b[^>]*>(.*?)</1>
CF RegEx Engine
Get Compiled
RegEx
Match the Input
with RegEx
Return
True/False
Lookup RegEx
Cache
Compile RegEx
Matchmaking

Rusty: XML’sTale
21
XmlParse(xmlText [, caseSensitive ], validator])
XML DOMTree

Rusty: XML’sTale
22
Scan the
classpath for the
parser available
Set up Parser
with all the
handlers and
config
CF 2016
Parse String XML
to tree
XML Parser creation
 Parser setup and creation is done every time

Rusty: XML’sTale
23
CF 2018
Parse String XML
to tree
Get a Parser
from Pool
Scan the
classpath for the
parser available
Set up Parser
with all the
handlers and
config
Parse String XML
to tree
XML Parser creation

Rusty: XML’sTale
24
• Reusing the Parser
• Ensuring the thread Safety

25
Rusty: XML’sTale

Array Functions
26

Save the Content
27
 /wwwroot/WEB-INF/cftags/savecontent.cfc
 CFModule
 Built-inTag 2018

Log
28
 Remove additivity for the loggers not having any parent loggers
 Optimized file I/O when writing log message to file

Insert
29
 When retrieving metadata for a SQL table requesting only required fields.

Filling in the stack trace is slow
• Exception creation is very slow
• The deep the thread stack the more time is spent in filling stacktrace
• Should be used for unexpected problems.
30

Throw and Rethrow
31
try {
throw(message="Oops", detail="xyz");
} catch (any e) {
writeOutput("Error: " & e.message);
} finally {
writeOutput("I run even if no error");
}
 compiler optimization
 Optimized bytecode instruction

Performance
32
CF
Engine
Language
Core
Runtime
Tags
Functions

Finding Application
33
Setting in CF Admin to specify the order of search
Caching the search for Application.cfc/cfm for a requested template
Caching happens only when trusted cache is enabled
Improved the way of calling of event listeners such as
onRequestStart, OnRequestEnd etc.
Check for Application.cfc/cfm
in parent directory
Found Application.cfc?
Check for Application.cfc/cfm
in current directory
Start
Return
Path

Path Caching
34
ColdFusion 2016 & earlier
ColdFusion 2018
Searching for path happens when
ExpandPath
CFInclude
CFModule
Invoking a CFC/CFM
Earlier depends on tomcat container for caching
Extended for multiple websites

I/O optimization
• Invoking CFC when implementing interface
• Validity of the interface implementation checked every time
• Now caching successful validation results
• Making use of trusted cache setting
• CF Mappings/ CustomTag Paths
• Searching for a file in Mappings & custom tag paths has been optimized
• Less file disk I/O
35

Setup
36
OS &
Hardware Network JVM CFTuning
Windows 2012 R2
2 Sockets/4 cores@socket
RAM 32 GB
DB: MS SQL 2012
MySQL 5.7
No OfTCP Ports
Increase open files (ulimit)
Heap Size 2 GB
Parallel GC
Metaspace Size 1GB
Production Profile
Trusted Cache
Component Cache
Web server Path Cache
No. of concurrent requests
Tuning CF Connector

Application Performance improvement from CF 2016
37

Frameworks Performance improvement from CF 2016
38

Performance
39

Dang!!!
40
Tomcat shift towards NIO and making all the connectors
NIO improved its throughput and scalability.

41
Performance

JVM
42
 G1 (Garbage First) Garbage collection algorithm
 Ultra Low- pause time
 Concurrent Mark, Sweep and Compact
 It uses non-continuous spaces
 String Deduplication
 Around 10% Heap Reduction
G1 Memory Layout

Best Practices
• Reuse Expensive Objects (ensuring thread safety)
• Cache
• Reduced file I/O
• Reduced network I/O
• Less use of exceptions
• Using Better Algorithms
• Request only what needed
43

44
Performance White Paper
https://wwwimages2.adobe.com/content/dam/acom/en/products/coldfusion
/pdfs/CF2018_Performance.pdf

Appendix
• https://dzone.com/articles/choosing-the-right-gc
• https://blog.idrsolutions.com/2017/05/g1gc-java-9-garbage-collector-
explained-5-minutes/
• https://coldfusion.adobe.com/2018/07/distributed-caching-coldfusion-2018-
release/
• https://helpx.adobe.com/coldfusion/performance-monitoring-
toolset/overview-coldfusion-performance-monitoring-toolset.html
45

Q & A
sanniset@adobe.com

Developer insight into why applications run amazingly Fast in CF 2018

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