What steps should I take to optimize the performance of this code by implementing rate-limiting for its execution speed?

Question

What steps should I take to optimize the performance of this code by implementing rate-limiting for its execution speed?

As I pondered the task at hand, I realized that using a sleep function might be beneficial. However, Javascript lacks a built-in sleep function.

How can I tweak this process to avoid hitting a Parse rate-limit? My goal is to execute one (1) Parse.Cloud.run method every 5 seconds.

$('.website').each(function(i) {
    var website = $(this).text();
    Parse.Cloud.run('getMainEmail', {url: website}, {
        success: function(result) {
            cell.next().text(result);
        },
        error: function(error) {
            console.log("Couldn't find email for website: " + website);
            console.log(error);
        }
    });
});

Currently, the code scans all websites in the DOM and triggers numerous Parse requests simultaneously - resulting in an immediate rate limit restriction.

javascript parsing sleep

Answer 1

Answer №1

You can achieve this by using the setTimeout function and passing the website as a parameter.

$('.website').each(function(i) {
    var website = $(this).text();
    setTimeout(function(siteText){
    Parse.Cloud.run('getMainEmail', {url: siteText}, {
        success: function(result) {
        cell.next().text(result);
    },
    error: function(error) {
        console.log("Couldn't find email for website: " + siteText);
        console.log(error);
    }
    }, (i + 1) * 5000, website);
});

Answer 2

You can achieve this by using the setTimeout function and passing the website as a parameter.

$('.website').each(function(i) {
    var website = $(this).text();
    setTimeout(function(siteText){
    Parse.Cloud.run('getMainEmail', {url: siteText}, {
        success: function(result) {
        cell.next().text(result);
    },
    error: function(error) {
        console.log("Couldn't find email for website: " + siteText);
        console.log(error);
    }
    }, (i + 1) * 5000, website);
});

Answer 3

Answer №2

Here is a simple solution for you:

window.setInterval(function(){
    //insert your parsing code here
}, 5000)

Learn more about window.setInterval

Answer 4

Here is a simple solution for you:

window.setInterval(function(){
    //insert your parsing code here
}, 5000)

Learn more about window.setInterval

Answer 5

Answer №3

To effectively manage the actions, consider using a queue implementation:

var timer;
var queue = [];
function addToQueue(website) {
    queue.push(website);
    if (!timer) {
        processNextItem(); // initiate handling of first item immediately
        timer = setInterval(processNextItem, 5000);
    }
}

function processNextItem() {
    var website = queue.shift();
    if (queue.length === 0 && !timer) { 
        clearInterval(timer); // stop the timer
        timer = null;
    }

    Parse.Cloud.run('getMainEmail', {url: website}, {
        success: function(result) {
            cell.next().text(result);
        },
        error: function(error) {
            console.log("Error finding email for website: " + website);
            console.log(error);
        }
    });
}

Your original code can then be modified to:

$('.website').each(function(i) {
    addToQueue($(this).text());
});

If a slight delay before processing the first item is acceptable, you can simplify the design by having a continuous interval running:

var queue = [];
setInterval(function () {
    if (queue.length) { 
        var website = queue.shift();
        Parse.Cloud.run('getMainEmail', {url: website}, {
            success: function(result) {
                cell.next().text(result);
            },
            error: function(error) {
                console.log("Error finding email for website: " + website);
                console.log(error);
            }
        });
   }
}, 5000);

$('.website').each(function(i) {
    queue.push($(this).text());
});

Answer 6

To effectively manage the actions, consider using a queue implementation:

var timer;
var queue = [];
function addToQueue(website) {
    queue.push(website);
    if (!timer) {
        processNextItem(); // initiate handling of first item immediately
        timer = setInterval(processNextItem, 5000);
    }
}

function processNextItem() {
    var website = queue.shift();
    if (queue.length === 0 && !timer) { 
        clearInterval(timer); // stop the timer
        timer = null;
    }

    Parse.Cloud.run('getMainEmail', {url: website}, {
        success: function(result) {
            cell.next().text(result);
        },
        error: function(error) {
            console.log("Error finding email for website: " + website);
            console.log(error);
        }
    });
}

Your original code can then be modified to:

$('.website').each(function(i) {
    addToQueue($(this).text());
});

If a slight delay before processing the first item is acceptable, you can simplify the design by having a continuous interval running:

var queue = [];
setInterval(function () {
    if (queue.length) { 
        var website = queue.shift();
        Parse.Cloud.run('getMainEmail', {url: website}, {
            success: function(result) {
                cell.next().text(result);
            },
            error: function(error) {
                console.log("Error finding email for website: " + website);
                console.log(error);
            }
        });
   }
}, 5000);

$('.website').each(function(i) {
    queue.push($(this).text());
});

What steps should I take to optimize the performance of this code by implementing rate-limiting for its execution speed?

Answer №1

Answer №2

Answer №3

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