ABSTRAKSI: Teknologi web pada saat ini telah berkembang pesat. Dimana teknologi web saat ini banyak digunakan sebagai media pertukaran informasi yang banyak diminati. Saat banyak aplikasi web yang telah memanfaatkan metode Asynchronous JavaScript and XMLHTTP (AJAX) sebagai metode pertukaran data antara client dan server. pertukaran ada antara client dan server pada aplikasi web masih dirasakan belum cukup karena adanya batasan same origin policy. Batasan tersebut sebenarnya dapat dihilangkan dengan menggunakan beberapa teknik pertukaran data yaitu dengan JSONP dan Cross Origin Resource Sharing.Dalam penggunaan teknik-teknik tersebut tentu saja terdapat kelebihan dan kekurangan masing-masing.Dengan menggunakan JSONP maupun Cross Origin Resource Sharing.dilakukan pengukuran performansi cross-origin resource sharing dan JSONP dari sisi jenis browser, request method dan ukuran file terhadap tingkat keakuratan data, load time dan parsing time dengan menggunakan metode load testing. Hasil pengujian teknik Cross Origin Resource Sharing menggunakan format data JSON memiliki performansi lebih baik dibandingkan teknik Cross Origin Resource Sharing menggunakan format data XML dan JSONP. Tingkat akurasi data teknik Cross Origin Resource Sharing dan JSONP menunjukkan nilai 100% untuk jumlah data uji yang sangat besar sekalipun.
Kata Kunci : load time, parsing time, request method, same origin policy, AJAXABSTRACT: Web technology today has grown rapidly. Web technology is currently widely used as a medium for exchanging information. While many web applications that have utilized Asynchronous JavaScript and XMLHTTP (AJAX) as a method of data exchange between client and server. This process between the client and the server in the web application is still being felt not enough because of the same origin policy restrictions. These limits can actually be eliminated by using several techniques, namely data exchange with JSONP and Cross Origin Resource Sharing. In using these techniques, of course there are advantages and disadvantages of each. By using JSONP and Cross Origin Resource Sharing, the performance cross-origin resource sharing and JSONP are measured by the browser type, request method and file size to the level of accuracy of the data, load time and parsing time using load testing. For the results of this testing, the Cross Origin Resource Sharing using JSON data format has better performance than Cross Origin Resource Sharing using XML data formats and JSONP. The data accuracy rate of Cross Origin Resource Sharing and JSONP showed a value of 100% for the amount of test data that is huge though.Keyword: load time, parsing time, request method, same origin policy, AJAX