Exploring the approach of third-party plugins in addressing this particular issue could unveil valuable insights. Let's take a closer look at some examples:

Analyze

<script type="text/javascript>var _kmq = _kmq || [];
var _kmk = _kmk || 'xxx';
function _kms(u){
  setTimeout(function(){
    var d = document, f = d.getElementsByTagName('script')[0],
    s = d.createElement('script');
    s.type = 'text/javascript'; s.async = true; s.src = u;
    f.parentNode.insertBefore(s, f);
  }, 1);
}
_kms('//i.kissmetrics.com/i.js');
_kms('//doug1izaerwt3.cloudfront.net/' + _kmk + '.1.js');
</script>

Directing attention to the line containing var _kmk = _kmk || 'xxx';, where 'xxx' denotes the key location. Once loaded, the library can utilize the predetermined _kmk variable to execute operations.

For a more intricate example, consider Keen:

<script type="text/javascript>
    var Keen=Keen||{configure:function(e){this._cf=e},addEvent:function(e,t,n,i){this._eq=this._eq||[],this._eq.push([e,t,n,i])},setGlobalProperties:function(e){this._gp=e},onChartsReady:function(e){this._ocrq=this._ocrq||[],this._ocrq.push(e)}};(function(){var e=document.createElement("script");e.type="text/javascript",e.async=!0,e.src=("https:"==document.location.protocol?"https://":"http://")+"dc8na2hxrj29i.cloudfront.net/code/keen-2.1.0-min.js";var t=document.getElementsB...
                    </div></answer1>
<exanswer1><div class="answer accepted" i="32388720" l="3.0" c="1441318868" v="1" a="c2ljMQ==" ai="528436">
<p>Examining how third-party plugins tackle and manage this specific issue could offer invaluable insights. Let's investigate a couple of instances:</p>

<p>KISSmetrics</p>

<pre><code><script type="text/javascript>var _kmq = _kmq || [];
var _kmk = _kmk || 'xxx';
function _kms(u){
  setTimeout(function(){
    var d = document, f = d.getElementsByTagName('script')[0],
    s = d.createElement('script');
    s.type = 'text/javascript'; s.async = true; s.src = u;
    f.parentNode.insertBefore(s, f);
  }, 1);
}
_kms('//i.kissmetrics.com/i.js');
_kms('//doug1izaerwt3.cloudfront.net/' + _kmk + '.1.js');
</script>

Spotlighting the line featuring var _kmk = _kmk || 'xxx';, where 'xxx' represents the key position. Following the library's load, it can access the predefined _kmk variable to carry out tasks.

An illustration of greater complexity is Keen:

<script type="text/javascript>
    var Keen=Keen||{configure:function(e){this._cf=e},addEvent:function(e,t,n,i){this._eq=this._eq||[],this._eq.push([e,t,n,i])},setGlobalProperties:function(e){this._gp=e},onChartsReady:function(e){this._ocrq=this._ocrq||[],this._ocrq.push(e)}};(function(){var e=document.createElement("script");e.type="text/javascript",e.async=!0,e.src=("https:"==document.location.protocol?"https://":"http://")+"dc8na2hxrj29i.cloudfront.net/code/keen-2.1.0-min.js";var t=document.getElementsB...
                    </div></answer1>
<exanswer1><div class="answer accepted" i="32388720" l="3.0" c="1441318868" v="1" a="c2ljMQ==" ai="528436">
<p>Diving into how third-party plugins handle this situation could yield valuable perspectives. Let's explore a couple of examples for better understanding:</p>

<p>KISSmetrics</p>

<pre><code><script type="text/javascript>var _kmq = _kmq || [];
var _kmk = _kmk || 'xxx';
function _kms(u){
  setTimeout(function(){
    var d = document, f = d.getElementsByTagName('script')[0],
    s = d.createElement('script');
    s.type = 'text/javascript'; s.async = true; s.src = u;
    f.parentNode.insertBefore(s, f);
  }, 1);
}
_kms('//i.kissmetrics.com/i.js');
_kms('//doug1izaerwt3.cloudfront.net/' + _kmk + '.1.js');
</script>

Narrowing down on the line containing var _kmk = _kmk || 'xxx';, in which 'xxx' signifies the key location. After loading the library, it can make use of the set _kmk variable to perform necessary actions.

A more intricate demonstration would be Keen:

<script type="text/javascript>
    var Keen=Keen||{configure:function(e){this._cf=e},addEvent:function(e,t,n,i){this._eq=this._eq||[],this._eq.push([e,t,n,i])},setGlobalProperties:function(e){this._gp=e},onChartsReady:function(e){this._ocrq=this._ocrq||[],this._ocrq.push(e)}};(function(){var e=document.createElement("script");e.type="text/javascript",e.async=!0,e.src=("https:"==document.location.protocol?"https://":"http://")+"dc8na2hxrj29i.cloudfront.net/code/keen-2.1.0-min.js";var t=document.getElementsByTagName("script")[0];t.parentNode.insertBefore(e,t)})();
    Keen.configure({
        projectId: "xxxxxx",
        writeKey: "xxxxxx", // required for sending events
        readKey: "xxxxxx"    // required for doing analysis
    });
</script>

Observe their setup with a concise API to pass configuration data efficiently. Opt for the simplest route like KISS if a single key suffices or consider something similar to Keen for transmitting multiple details. Referencing conventional methods such as Google Analytics might also provide useful insights.

Share your thoughts on this. Examining how current companies approach this scenario should certainly aid in decision-making. The key focus is ensuring rapid delivery of a single cached JS file rather than generating files individually for each user, which could strain server resources significantly.