[#IDEA-15559] Typing etc. dead slow as soon as >1 projects open

IDEA: Feedback

Typing etc. dead slow as soon as >1 projects open

Created: 08 Oct 07 23:14 Updated: Thursday 20:05

Component/s:

Editor. Code Completion, Editor. Editing Text

File Attachments:

7330_yc_08.10.2007_21.14.35.zip (1.44 Mb)
2.

7330_yc_08.10.2007_21.15.34.zip (1.44 Mb)
3.

IntelliJIDEA-2007-10-09(1).snapshot (5.79 Mb)
4.

IntelliJIDEA-2007-10-09.snapshot (5.40 Mb)

Image Attachments:

1. screenshot-1.jpg
(243 kb)

Environment:

Win XP, P4HT, 1GB RAM

Build:

7,330

Description

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experience 1/2 - 1 sec delay in autocompletion

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Comments

Work Log

Change History

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Yann Cébron - 08 Oct 07 23:15

trigger autocompletion with 2 projects

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Yann Cébron - 08 Oct 07 23:16

autocompletion with only one project open

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Taras Tielkes - 09 Oct 07 00:38

I've experienced this as well with #7330.

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Dmitry Jemerov - 09 Oct 07 13:06

The snapshot doesn't show any significant CPU usage. Could you please connect to IDEA with YourKit 7 and take a monitor usage snapshot?

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Taras Tielkes - 09 Oct 07 14:00

Dmitry, as far as I know you cannot 'save' or capture a monitor snapshot with YK, correct?

Anyway, attached screenshot shows the monitor usage tag for a short editing session with 3 projects open.

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Dmitry Jemerov - 09 Oct 07 14:03

Taras,

You can actually save monitor snapshots. The "Start Monitor Profiling" button starts recording monitor usage, and "Capture Performance Snapshot" saves the monitor usage data to a .snapshot file.

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Yann Cébron - 09 Oct 07 21:53

autocompletion with one project open

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Yann Cébron - 09 Oct 07 21:55

two projects

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Dmitry Jemerov - 11 Oct 07 16:32

Doesn't look like the monitor snapshots contain any useful information.

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Sascha Weinreuter - 11 Oct 07 17:03

Such slowness can happen when the heap size limit is reached and the GC tries to squeeze out the last free bytes. Increasing the heap size could help.

FWIW, I haven't yet seen any performance degradation with two or more open projects.

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Bas Leijdekkers - 08 Nov 07 16:47

I see this behavior too. It has been a problem for quite a while, I started complaining about it at the start of the Selena EAP, if I remember correctly. At the time it seemed I was suffering for several different kinds of performance problems, so my bug report was not very good: IDEA-11775

Currently the editing performance is quite snappy if I have only one project open. With multiple projects open, performance is terrible (on a single core machine).

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Bas Leijdekkers - 08 Nov 07 16:49

By the way, I only have plain java and plugin projects, no Spring, Hibernate, JSP or anything like that.

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Jorge Montero - 08 May 08 20:05

We've seen this one on single core machines at my workplace since we installed 7. Machines with 2 gigs of RAM and 512 mb set for idea crawl when two projects are open, and are still way slower than Idea 6 ever was.

In a multi-core machine, with otherwise the same specs, Idea works well.