Benchmark: Testing var undefined comparison & checking it via object/array. - MeasureThat.net

Testing var undefined comparison & checking it via object/array. (version: 9)

(1 in arguments) means to check if "2nd var" parameter is defined in arguments list in a function.

Comparing performance of: !var1 vs var1===undefined vs var1 || var1==="" || var1===0 vs !(1 in arguments) vs !arguments[1] vs !object["var"] vs !object[0] vs !arguments["string"]

Created: 2 years ago by: Registered User

Jump to the latest result

Script Preparation code:

var var1;
var arguments = ["sdfe"];
arguments["string"] = "data";
var object = {option:"yes", 0:"ok"};

Tests:

!var1
if(!var1);
var1===undefined
if(var1===undefined);
var1 || var1==="" || var1===0
if(var1 || var1==="" || var1===0);
!(1 in arguments)
if(!(1 in arguments));
!arguments[1]
if(!arguments[1]);
!object["var"]
if(!object["var"]);
!object[0]
if(!object[0]);
!arguments["string"]
if(!arguments["string"]);

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
!var1
var1===undefined
var1 \|\| var1==="" \|\| var1===0
!(1 in arguments)
!arguments[1]
!object["var"]
!object[0]
!arguments["string"]

Fastest: N/A

Slowest: N/A

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Latest run results:

Run details: (Test run date: 2 years ago)

User agent: Mozilla/5.0 (Windows NT 6.1; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/92.0.4515.107 Safari/537.36

Browser/OS: Chrome 92 on Windows 7

View result in a separate tab

Test name	Executions per second
!var1	8161506.0 Ops/sec
var1===undefined	3139365.0 Ops/sec
var1 \|\| var1==="" \|\| var1===0	2638536.0 Ops/sec
!(1 in arguments)	725452300.0 Ops/sec
!arguments[1]	734250200.0 Ops/sec
!object["var"]	8490036.0 Ops/sec
!object[0]	8337537.0 Ops/sec
!arguments["string"]	669589600.0 Ops/sec