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Tab completion in large folders is very slow #4797

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#19489
Closed
Tab completion in large folders is very slow#4797
#19489
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HacktoberfestPotential candidate to participate in HacktoberfestPotential candidate to participate in HacktoberfestResolution-FixedThe issue is fixed.The issue is fixed.Usability(LEGACY) Helps filter issues that might be higher priority because they directly affect usability(LEGACY) Helps filter issues that might be higher priority because they directly affect usabilityWG-Engine-Performancecore PowerShell engine, interpreter, and runtime performancecore PowerShell engine, interpreter, and runtime performanceWG-Interactive-IntelliSensetab completiontab completion
@vors

Description

@vors
vors
opened on Sep 10, 2017
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Steps to reproduce

Get a folder with a decent number of files (65k will do)
Try to do autocompletion on file name in this folder

Expected behavior

Respond time comparable with bash completion (about a second)

Actual behavior

No response for 12 seconds (appears like a hang)

For comparisons, ls | measure in the same folder takes about 4 seconds (3 times faster), which hints that there is a room for improvements even without a big rewrite for the completion logic.

Environment data

> $PSVersionTable
Name                           Value                                           
----                           -----                                           
PSVersion                      6.0.0-beta                                      
PSEdition                      Core                                            
GitCommitId                    v6.0.0-beta.5                                   
OS                             Darwin 16.7.0 Darwin Kernel Version 16.7.0: T...
Platform                       Unix                                            
PSCompatibleVersions           {1.0, 2.0, 3.0, 4.0...}                         
PSRemotingProtocolVersion      2.3                                             
SerializationVersion           1.1.0.1                                         
WSManStackVersion              3.0
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    HacktoberfestPotential candidate to participate in HacktoberfestPotential candidate to participate in HacktoberfestResolution-FixedThe issue is fixed.The issue is fixed.Usability(LEGACY) Helps filter issues that might be higher priority because they directly affect usability(LEGACY) Helps filter issues that might be higher priority because they directly affect usabilityWG-Engine-Performancecore PowerShell engine, interpreter, and runtime performancecore PowerShell engine, interpreter, and runtime performanceWG-Interactive-IntelliSensetab completiontab completion

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