Closed Bug 836070 Opened 12 years ago Closed 12 years ago

memory usage of about:blank adds up with many unloaded tabs

Categories

(Firefox :: Untriaged, defect)

Product:
Firefox
Component:
Untriaged
Version:
19 Branch
Platform:
x86_64
Windows 7
Type:
defect
Priority:
Not set
Severity:
normal

Tracking

()

Status:
RESOLVED DUPLICATE of bug 681201

People

(Reporter: tyaremco, Unassigned)

Details

(Whiteboard: [Memshrink])

User Agent: Mozilla/5.0 (Windows NT 5.1; WOW64; rv:19.0) Gecko/20100101 Firefox/19.0 Build ID: 20130123083802 Steps to reproduce: I run Firefox with many tabs (500 - 1000). I notice that even when tabs are unloaded (tabs on demand enabled), I see this in about:memory ─516.34 MB (39.79%) -- window-objects │ ├──421.90 MB (32.51%) -- (1232 tiny) ... │ │ ├────0.21 MB (00.02%) ++ top(about:blank, id=1597)/active/window(about:blank) │ │ ├────0.21 MB (00.02%) ++ top(about:blank, id=3193)/active/window(about:blank) │ │ ├────0.21 MB (00.02%) ++ top(about:blank, id=609)/active/window(about:blank) │ │ ├────0.21 MB (00.02%) ++ top(about:blank, id=2207)/active/window(about:blank) │ │ ├────0.21 MB (00.02%) ++ top(about:blank, id=3803)/active/window(about:blank) │ │ ├────0.21 MB (00.02%) ++ top(about:blank, id=1219)/active/window(about:blank) │ │ ├────0.21 MB (00.02%) ++ top(about:blank, id=2817)/active/window(about:blank) ... Actual results: With many tabs, 0.21 MB adds up quickly. For me, it's usually several hundred MB. Expected results: Unloaded tabs should be almost negligibly small in memory. Is it necessary to load an individual about:blank for every unloaded tab? It seems to me (naively) that 0.21 MB is way too large for what should essentially be just a tab, a url and a favicon. What else is happening with these tabs?
OS: Windows XP → Windows 7
Whiteboard: [Memshrink]
If it's any consolation, it's smaller than it used to be. Still room for improvement, though.
Status: UNCONFIRMED → RESOLVED
Closed: 12 years ago
Resolution: --- → DUPLICATE
(In reply to tyaremco from comment #0) > Is it necessary to load an individual about:blank for every unloaded tab? > It seems to me (naively) that 0.21 MB is way too large for what should > essentially be just a tab, a url and a favicon. Do not forget the history. Nor the form data. But you are right on the fact that the memory used is hugely too much.
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