<f:ajax render="@none" execute="@this"> and reducing submitted post data size in large form

i have a huge jsf-page with an underlying ViewScopeBean that contains a very large form (containing nearly 100 inputs) with many ajaxified input fields. for every input field, i only submit the current value and render nothing. so just a sample field in that form:

<h:selectBooleanCheckbox id="includeForeignCurrencies" 
                         value="#{RatingManagerBean.formData.foreignCurrencies}"
                         action="#{RatingManagerBean.calculate}">

    <f:ajax render="@none" execute="includeForeignCurrencies"/> 

</h:selectBooleanCheckbox>

after the ajax post i inspect e.g. the developer tools in firebug and recognize that the submitted size of the post data is up to 2 kb. then i select the row, choose "copy post data" and pasted it into an editor:

every field of that form is submitted although i am only interested in the current changed field:

form-search=form-search
countryCode=AT
ratingType={"type":"COUNTRY"}
averageRating
minAmount
maxAmount
averageAmount
company
location
staffResponsible
staffResponsible2
requestDate
reminderDate
acutalCurrency
compareCurrencies   

 //70 other empty form-ids....

includeForeignCurrencies=on

javax.faces.ViewState=1825148886808299106:-354534052529224349
javax.faces.source=includeForeignCurrencies
javax.faces.partial.event=click
javax.faces.partial.execute=includeForeignCurrencies
javax.faces.behavior.event=valueChange
javax.faces.partial.ajax=true

is there a way to reduce the posted data like:

includeForeignCurrencies=on

javax.faces.ViewState=1825148886808299106:-354534052529224349
javax.faces.source=includeForeignCurrencies
javax.faces.partial.event=click
javax.faces.partial.execute=includeForeignCurrencies
javax.faces.behavior.event=valueChange
javax.faces.partial.ajax=true

or even just

includeForeignCurrencies=on

thanks in advance!

Workaround:

as a possible workaround i came up with disabling all inputs that did not trigger the post and re-enable them in ajax complete. post data size is now 200 B instead of 2000 B.

as i am not sure if this may cause any other issues, this is an update of the question, not an answer.

<h:selectBooleanCheckbox id="includeForeignCurrencies" 
                     value="#{RatingManagerBean.formData.foreignCurrencies}"
                     action="#{RatingManagerBean.calculate}"
                     onclick="prepareAjaxPost(this)">

<f:ajax render="@none" execute="includeForeignCurrencies" onevent="ajaxPostComplete"/> 

</h:selectBooleanCheckbox>

javascript/jQuery:

function prepareAjaxPost(source){   

   //keep already disabled inputs disabled
   $("#form-search :input:not(:disabled)").filter(function() {      

        return !this.id.match(/javax.faces.ViewState/); //all inputs ignoring jsf- viewstate ones

    }).each(function(){
          var input = $(this);
          var others = input.not(source); 
          others.attr("disabled", true);
          others.addClass("blocked"); //some style that has no visual effect for users

    });
}

function ajaxPostComplete(data) {
    switch (data.status) {      
        case "success": {

           $("#form-search :input.blocked").each(function(){
              $(this).attr("disabled",false).removeClass("blocked");     
           });

           break;
        }
}