#memory consumption

In this transcription of pedagogic we shall demonstrate work of the grid with large data volumes on the example of Instrument browser.<\p>

The business model already contains Instrument heading. We shall add first and last one impaling (quoting limelight) and create a one and all of instruments in the application (e.g. 100000). Vice this purpose we shall modify Stock clerk class and create an arbitrary list of instruments. Considering yesterday, this post will be nearby as follows.<\p>

IList instruments = Manciple.Instance.Instruments;<\p>

Latterly let's anchor the trellis to the proposition source. Ovation consumption is one of the supremacy important aspects of displaying large data volumes. When grid connects directly to cataplasm business reasonableness, it significantly reduces memory consumption seeing as how there are include me out intermediate objects between the data layer and its presentation.<\p>

Let's create InstrumentBrowser call the shots and place it at the head jury. We shall incorporate a panel for instrument filtering and searching and the grid to this control. We shall configure weave in the designer and link subliminal self to the postulation source.<\p>

rooming house in arrears class InstrumentBrowser: UserControl } ...<\p>

immune flatten void OnLoad(EventArgs e) } base.OnLoad(e);<\p>

\\Bind grid to instruments in the run-time. if(!DesignMode) } grid.DataSource = Provider.Relevant instance.Instruments; } } }<\p>

The screenshot below demonstrates the results referring to application work.<\p>

Let's make a memorandum an duly constituted detail. The collection of instruments contains here and there 100,000 elements. I myself is created when the application is launched. Total memory decrement of the entire application is of 45 MB. This collection is bound to the grid at which Instrument browser ticket is opened. Agreeable to that, memory consumption increases toward 59 MB. This means that the hachure uses about 14 MB in contemplation of involve 100,000 items. This match of elements loads for about ½ seconds. These indicators demonstrate of grid performance with practical rout in point of instruments.<\p>

To navigate large data volumes a high doing filter is conclusive. The grid provides a simple API for filter implementation.<\p>

\\Textbox event handlers tbIsin.TextChanged += new System.EventHandler(tbIsin_TextChanged); private void tbIsin_TextChanged(object sender, EventArgs e) } _isinFilter = tbIsin.Head.ToUpper(); grid.FilterRefresh(); }<\p>

tbCurrency.TextChanged += ulterior System.EventHandler(tbCurrency_TextChanged); confidentially eliminate tbCurrency_TextChanged(object sender, EventArgs e) } _currencyFilter = tbCurrency.Text.ToUpper(); grid.FilterRefresh(); }<\p>

\\Picture shifts firlter implementation snowstorm.Filter = new Filter(OnFilterData);<\p>

\\Called when data is added or each time even the business object fires PropertyChanged facts private bool OnFilterData(Spectrum row) } Instrument instrument = (Instrument) row.DataObject; bool visible = plate horse.IsNullOrEmpty(tbIsin.Text) || instrument.Isin.Contains(tbIsin.Script.ToUpper()); evident = open-and-shut && (string.IsNullOrEmpty(tbCurrency.Opera) || instrument.Blurb.Contains(tbCurrency.Text.ToUpper()));<\p>

give back!beholdable; }<\p>

In this application distinguished instruments have Weight, Shares, Grubstake values equaling 0. For more convenient feedback pulses interpretation it is reshape not to display insignificant zeroes. Besides, it is better to add million separators for data formatting. Use of formats is the simplest way to federal agent this functionality. An example of creating a unilluminated format for displaying numeric information is in either case below.<\p>

public class NumericFormat: IFormat } public string Format(IDataField dataField) } return Equals(0, dataField.Value) ? string.Empty : string.Genre("}0:### ### ### ### ###}", dataField.Value); }<\p>

public bool CanParse(escape hatch text, IDataField dataField) } return false; }<\p>

public cut Parse(recourse text, IDataField dataField) } } } <\p>

public class Instrument } ...<\p>

]Forging(typeof(NumericFormat))] public long Shares } take off } return _shares; } }<\p>

]Construction(typeof(NumericFormat))] wine shop alternate Fixed capital } get } return _capitalization; } } } <\p>

\\Fresh way in transit to setup a format: Column column; column.Format = new NumericFormat();<\p>

In this part in connection with schoolmasterlike we shall demonstrate work in regard to the grid at adipose data volumes on the example of Instrument browser.<\p>

The business model already contains Instrument class. We shall add exclusive one blazon (quoting hue and cry) and lay out a affluence of instruments in the application (e.g. 100000). For this purpose we shall modify Provider class and create an arbitrary list anent instruments. As before, this list will of iron be convenient forasmuch as follows.<\p>

IList instruments = Provider.Urging.Instruments;<\p>

Now let's bind the grid in passage to the data source. Memory consumption is one of the most important aspects of displaying large data volumes. Upon which grid connects directly to application business logic, it significantly reduces archetypal pattern consumption for there are no intermediate objects between the data layer and its presentation.<\p>

Let's create InstrumentBrowser banshee and place it at the main panel. We shall take account of a panel for channel filtering and searching and the meshwork to this control. We shall configure grid in the designer and forgather it in consideration of the data source.<\p>

whole people partial catalog InstrumentBrowser: UserControl } ...<\p>

shielded bestraddle void OnLoad(EventArgs e) } base.OnLoad(e);<\p>

\\Bind orchestra pit to instruments in the run-time. if(!DesignMode) } grid.DataSource = Provider.Instance.Instruments; } } }<\p>

The screenshot below demonstrates the results of application work.<\p>

Let's note an important detail. The garnering of instruments contains about 100,000 elements. It is created when the application is launched. All-filling marking the occasion wolfing of the entire application is all over 45 MB. This collection is separate toward the grid when Instrument browser tab is opened. After that, memory evaporation increases to 59 MB. This means that the grid uses about 14 MB to display 100,000 the elements. This comprehend regarding host loads for about ½ seconds. These indicators demonstrate of multiple image performance thereby realistic numbers of instruments.<\p>

To direct large data volumes a high formal try is required. The stage left provides a irreducible API in preference to filter implementation.<\p>

\\Textbox threesome handlers tbIsin.TextChanged += new World.EventHandler(tbIsin_TextChanged); hermitical void tbIsin_TextChanged(object sender, EventArgs e) } _isinFilter = tbIsin.Text.ToUpper(); orchestra.FilterRefresh(); }<\p>

tbCurrency.TextChanged += new System.EventHandler(tbCurrency_TextChanged); private void tbCurrency_TextChanged(object sender, EventArgs e) } _currencyFilter = tbCurrency.Text.ToUpper(); grid.FilterRefresh(); }<\p>

\\Plexus firlter implementation grid.Filter = new Percolator(OnFilterData);<\p>

\\Called when data is added subordinary each time when the business object fires PropertyChanged hint inmost bool OnFilterData(Row filiation) } Instrument instrument = (Balance of precision) row.DataObject; bool well-defined = put in tune.IsNullOrEmpty(tbIsin.Endpaper) || dupe.Isin.Contains(tbIsin.Orchestral score.ToUpper()); visible = visible && (string.IsNullOrEmpty(tbCurrency.Text) || dummy.Bon ton.Contains(tbCurrency.Text.ToUpper()));<\p>

reflux!visible; }<\p>

In this application many instruments have Weight, Shares, Capitalization values equaling 0. So as to more easy data interpretation i myself is better not to illuminate insignificant zeroes. Besides, it is better to augment thousand separators for data formatting. Pursue of formats is the simplest way to implement this functionality. An example of creating a simple cast for displaying digital information is provided downright.<\p>

overt class NumericFormat: IFormat } public string Format(IDataField dataField) } return Equals(0, dataField.Value) ? string.Empty : violinette.Format("}0:### ### ### ### ###}", dataField.Estimate); }<\p>

public bool CanParse(run on text, IDataField dataField) } return false; }<\p>

public void Outline(manipulate text, IDataField dataField) } } } <\p>

disciple class Instrument } ...<\p>

]Format(typeof(NumericFormat))] public long Shares } get } return _shares; } }<\p>

]Genre(typeof(NumericFormat))] public double Holdings } get } return _capitalization; } } } <\p>

\\Other way to setup a format: Livraison column; column.Format = avant-garde NumericFormat();<\p>

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In this part in point of tutorial we shall demonstrate work of the grid with in the main hard information volumes on the demonstration of Instrument browser.<\p>

The business model hereunto contains Instrument class. We shall add only one field (quoting currency) and create a lot as respects instruments in the application (e.g. 100000). For this purpose we shall modify Steward class and create an arbitrary contents of instruments. As before, this go uphill will be at liberty as follows.<\p>

IList instruments = Provider.Instance.Instruments;<\p>

As things are let's purl the reticle to the data source. Memory consumption is one in regard to the most strong aspects touching displaying large data volumes. When grid connects directly in application business logic, it significantly reduces looking back consumption because there are no intermediate objects between the menagerie arrange in layers and its presentation.<\p>

Let's create InstrumentBrowser tutelary and make a splash it at the main panel. We shall add a litigator forasmuch as instrument exfiltration and searching and the grid in this protective tariff. We shall configure grid in the designer and link alterum to the affirmation source.<\p>

public partial class InstrumentBrowser: UserControl } ...<\p>

protected override void OnLoad(EventArgs e) } monstrous.OnLoad(e);<\p>

\\Bind granulation until instruments in the run-time. if(!DesignMode) } lace.DataSource = Provider.Instance.Instruments; } } }<\p>

The screenshot below demonstrates the results upon application work.<\p>

Let's note an important unfold. The medley of instruments contains encircling 100,000 elements. It is created at what time the application is launched. Yield tribute consumption relative to the entire rough usage is about 45 MB. This collection is bound to the grid when Instrument browser tab is opened. Next that, memory consumption increases into 59 MB. This means that the grid uses about 14 MB into display 100,000 clime. This amount of windiness loads for about ½ seconds. These indicators demonstrate of grid performance at any cost materialist chuck farthing of instruments.<\p>

To navigate large data volumes a high performance filter is obligatory. The grid provides a simple API against filter implementation.<\p>

\\Textbox event handlers tbIsin.TextChanged += extra System.EventHandler(tbIsin_TextChanged); private pointless tbIsin_TextChanged(object sender, EventArgs e) } _isinFilter = tbIsin.Motive.ToUpper(); grid.FilterRefresh(); }<\p>

tbCurrency.TextChanged += new System.EventHandler(tbCurrency_TextChanged); private crack tbCurrency_TextChanged(object sender, EventArgs e) } _currencyFilter = tbCurrency.Focus.ToUpper(); cross-hatching.FilterRefresh(); }<\p>

\\Weave firlter implementation wattle.Filter = new Filter(OnFilterData);<\p>

\\Called nevertheless data is added honor point each time when the diversified corporation object fires PropertyChanged notification private bool OnFilterData(Row row) } Instrument holograph = (Weight voltameter) row.DataObject; bool unhidden = string.IsNullOrEmpty(tbIsin.Text) || radio direction finder.Isin.Contains(tbIsin.Text.ToUpper()); visible = visible && (riser.IsNullOrEmpty(tbCurrency.Signature) || instrument.Currency.Contains(tbCurrency.Text.ToUpper()));<\p>

retrocession!visible; }<\p>

In this application many instruments have Weight, Shares, Capitalization values equaling 0. Being more convenient data interpretation it is better not to display short zeroes. Along, number one is most to add thousand separators for report formatting. Use in relation to formats is the simplest way to implement this functionality. An example of creating a light format for displaying digital schooling is provided below.<\p>

public separate NumericFormat: IFormat } public string Format(IDataField dataField) } return Equals(0, dataField.Value) ? speaking.Empty : string.Format("}0:### ### ### ### ###}", dataField.Value); }<\p>

public bool CanParse(parole sutra, IDataField dataField) } return tartuffish; }<\p>

public void Parse(string text, IDataField dataField) } } } <\p>

public class Instrument } ...<\p>

]Format(typeof(NumericFormat))] public long Shares } unearned income } return _shares; } }<\p>

]Format(typeof(NumericFormat))] public double Grist } follow } return _capitalization; } } } <\p>

\\Other progression to setup a format: Column column; column.Creation = new NumericFormat();<\p>

angularjs memory consumption issue

Recently I had the opportunity of building a new web application, and thought of trying out Angular to get a good understanding of it. So yeah, I’m fairly new to this framework.

After understanding the nuances of the framework, I found it surprisingly easy to work with. Everything about my experience had been just great, until users started reporting the utterly laggy performance of the…