Closed
Bug 36485
Opened 24 years ago
Closed 24 years ago
Batch reflows when loading user prefs
Categories
(Core Graveyard :: Profile: BackEnd, defect, P2)
Core Graveyard
Profile: BackEnd
Tracking
(Not tracked)
VERIFIED
FIXED
M16
People
(Reporter: pierre, Assigned: eric)
References
Details
(Keywords: perf)
This bug is extracted from the email thread we had yesterday on <c- t@netscape.com> ("Please Review: Reflow Counts Statistics"). sfraser wrote: ---- As the profile manager sets up user preferences, the pref callbacks in nsPresContext get called for each of the following preferences (for me) (I added a printf in nsPresContext::PreferenceChanged() to catch these): Reflow because pref browser.background_color changed Reflow because pref browser.use_document_colors changed Reflow because pref browser.wfe.use_windows_colors changed Reflow because pref font.size.variable.ar changed Reflow because pref font.size.fixed.ar changed Reflow because pref font.size.variable.el changed Reflow because pref font.size.fixed.el changed Reflow because pref font.size.variable.he changed Reflow because pref font.size.fixed.he changed Reflow because pref font.size.variable.ja changed Reflow because pref font.size.fixed.ja changed Reflow because pref font.size.variable.ko changed Reflow because pref font.size.fixed.ko changed Reflow because pref font.size.variable.th changed Reflow because pref font.size.fixed.th changed Reflow because pref font.size.variable.tr changed Reflow because pref font.size.fixed.tr changed Reflow because pref font.size.variable.x-baltic changed Reflow because pref font.size.fixed.x-baltic changed Reflow because pref font.size.variable.x-central-euro changed Reflow because pref font.size.fixed.x-central-euro changed Reflow because pref font.size.variable.x-cyrillic changed Reflow because pref font.size.fixed.x-cyrillic changed Reflow because pref font.size.variable.x-unicode changed Reflow because pref font.size.fixed.x-unicode changed Reflow because pref font.size.variable.x-western changed Reflow because pref font.size.fixed.x-western changed Reflow because pref font.size.variable.zh-CN changed Reflow because pref font.size.fixed.zh-CN changed Reflow because pref font.size.variable.zh-TW changed Reflow because pref font.size.fixed.zh-TW changed Reflow because pref browser.use_document_fonts changed Reflow because pref font.name.serif.ar changed Reflow because pref font.name.sans-serif.ar changed Reflow because pref font.name.monospace.ar changed Reflow because pref font.name.cursive.ar changed Reflow because pref font.name.fantasy.ar changed Reflow because pref font.name.serif.el changed Reflow because pref font.name.sans-serif.el changed Reflow because pref font.name.monospace.el changed Reflow because pref font.name.cursive.el changed Reflow because pref font.name.fantasy.el changed Reflow because pref font.name.serif.he changed Reflow because pref font.name.sans-serif.he changed Reflow because pref font.name.monospace.he changed Reflow because pref font.name.cursive.he changed Reflow because pref font.name.fantasy.he changed Reflow because pref font.name.serif.ja changed Reflow because pref font.name.sans-serif.ja changed Reflow because pref font.name.monospace.ja changed Reflow because pref font.name.cursive.ja changed Reflow because pref font.name.fantasy.ja changed Reflow because pref font.name.serif.ko changed Reflow because pref font.name.sans-serif.ko changed Reflow because pref font.name.monospace.ko changed Reflow because pref font.name.cursive.ko changed Reflow because pref font.name.fantasy.ko changed Reflow because pref font.name.serif.th changed Reflow because pref font.name.sans-serif.th changed Reflow because pref font.name.monospace.th changed Reflow because pref font.name.cursive.th changed Reflow because pref font.name.fantasy.th changed Reflow because pref font.name.serif.tr changed Reflow because pref font.name.sans-serif.tr changed Reflow because pref font.name.monospace.tr changed Reflow because pref font.name.cursive.tr changed Reflow because pref font.name.fantasy.tr changed Reflow because pref font.name.serif.x-baltic changed Reflow because pref font.name.sans-serif.x-baltic changed Reflow because pref font.name.monospace.x-baltic changed Reflow because pref font.name.cursive.x-baltic changed Reflow because pref font.name.fantasy.x-baltic changed Reflow because pref font.name.serif.x-central-euro changed Reflow because pref font.name.sans-serif.x-central-euro changed Reflow because pref font.name.monospace.x-central-euro changed Reflow because pref font.name.cursive.x-central-euro changed Reflow because pref font.name.fantasy.x-central-euro changed Reflow because pref font.name.serif.x-cyrillic changed Reflow because pref font.name.sans-serif.x-cyrillic changed Reflow because pref font.name.monospace.x-cyrillic changed Reflow because pref font.name.cursive.x-cyrillic changed Reflow because pref font.name.fantasy.x-cyrillic changed Reflow because pref font.name.serif.x-unicode changed Reflow because pref font.name.sans-serif.x-unicode changed Reflow because pref font.name.monospace.x-unicode changed Reflow because pref font.name.cursive.x-unicode changed Reflow because pref font.name.fantasy.x-unicode changed Reflow because pref font.name.serif.x-western changed Reflow because pref font.name.sans-serif.x-western changed Reflow because pref font.name.monospace.x-western changed Reflow because pref font.name.cursive.x-western changed Reflow because pref font.name.fantasy.x-western changed Reflow because pref font.name.serif.zh-CN changed Reflow because pref font.name.sans-serif.zh-CN changed Reflow because pref font.name.monospace.zh-CN changed Reflow because pref font.name.cursive.zh-CN changed Reflow because pref font.name.fantasy.zh-CN changed Reflow because pref font.name.serif.zh-TW changed Reflow because pref font.name.sans-serif.zh-TW changed Reflow because pref font.name.monospace.zh-TW changed Reflow because pref font.name.cursive.zh-TW changed Reflow because pref font.name.fantasy.zh-TW changed Reflow because pref browser.screen_resolution changed Reflow because pref font.default changed Reflow because pref font.size.fixed.x-western changed Reflow because pref font.size.variable.x-western changed This is a well-known problem, I believe. ---- And buster replied: ---- Isn't this exactly the kind of thing nsIPresShell::BeginReflowBatching() is designed for? When you know you're going to do a bunch of work, and it's unimportant to display partial results, we should be able to collect the reflow requests and handle them all at once when the caller is done making changes. ---
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Comment 1•24 years ago
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Hmmm. I would have thought this stuff is happening when there isn't even a window open. Why are there reflows going on at all? We're certainly not showing the prefs panel during startup! What is the recommended fix for this bug? Is it actually the profile manager that needs to change?
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Reporter | |
Comment 2•24 years ago
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Marked P2/M16. This problem has nothing to do with the Preferences dialog. I assigned this bug to "Profile Manager BackEnd" because it seemed to be the most logical component. Maybe it should go to "Preferences Backend", I don't know. The thing is: we start the application with default prefs, the Profile manager is displayed, the user selects a profile, then we load the rest of the application with the preferences that correspond to the selected profile. When we load either prefs (the default ones or the selected ones), we should tell the PresShell to batch the reflows. That's the bug. My guess was that the module in charge of loading the prefs was the Profile Manager. If I'm wrong, please reassign.
Priority: P3 → P2
Target Milestone: --- → M16
The preference callback nsPresContext::PreferenceChanged() is being called
"only" for the prefs which are registered for callbacks by
the nsPresContext and not all the prefs in all.js( there are lots more prefs in
all.js for which which the callback is not called).
The prefs
which have been registered by nsPresContext are
mPrefs->RegisterCallback("browser.screen_resolution", PrefChangedCallback,
(void*)this);
D:\seamonkey\mozilla\layout\base\src\nsPresContext.cpp(308):
mPrefs->RegisterCallback("browser.use_document_fonts", PrefChangedCallback,
(void*)this);
mPrefs->RegisterCallback("browser.use_document_colors", PrefChangedCallback,
(void*)this);
mPrefs->RegisterCallback("browser.background_color", PrefChangedCallback,
(void*)this);
mPrefs->RegisterCallback("browser.foreground_color", PrefChangedCallback,
(void*)this);
mPrefs->RegisterCallback("browser.base_font_scaler", PrefChangedCallback,
(void*)this);
mPrefs->RegisterCallback("browser.wfe.use_windows_colors", PrefChangedCallback,
(void*)this);
mPrefs->RegisterCallback("font.", PrefChangedCallback, (void*)this);
mPrefs->RegisterCallback("browser.display.direction", PrefChangedCallback,
(void*)this);
pref->RegisterCallback("intl.charset.detector", MyPrefChangedCallback, nsnull);
I agree, we are getting a lot of callbacks(52) for
nsPresContext::PreferenceChanged(), but libpref sends those callbacks, only if
you have registered for them.
Libpref has no ability to tell PresShell to batch the reflows. I believe,
evaughan has a fix for this problem.
Neeti
Assignee: neeti → pierre
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Assignee | |
Comment 5•24 years ago
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Yes I do have a fix for this. I'll close out when I check in. Reassigning to me.
Assignee: pierre → evaughan
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Reporter | |
Comment 7•24 years ago
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Eric: Nisheeth proposed a solution where the pref callbacks are ignored until BeginLoad() is called. I don't how that fits with your strategy.
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Assignee | |
Comment 8•24 years ago
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Not sure. My solution is more of a global solution that works for all StyleChanges everywhere not just the initial prefs. It currently works quite well.
Status: NEW → ASSIGNED
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Assignee | |
Comment 9•24 years ago
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fixed
Status: ASSIGNED → RESOLVED
Closed: 24 years ago
Resolution: --- → FIXED
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Updated•8 years ago
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Product: Core → Core Graveyard
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Description
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