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H Hasmawati
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Journal : Jurnal Teknik Informatika (JUTIF)

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An Evaluation of Self-Attentive Sequential Recommendation (SASRec) Algorithm Using Hyperparameter Tuning Wibowo, Agung Toto; Hasmawati, Hasmawati; Nurrahmi, Hani; Salsabila, Imtitsal Ulya
Jurnal Teknik Informatika (Jutif) Vol. 7 No. 2 (2026): JUTIF Volume 7, Number 2, April 2026
Publisher : Informatika, Universitas Jenderal Soedirman

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.52436/1.jutif.2026.7.2.5158

Abstract

Sequential recommendation is a branch of Recommender Systems that aims to predict the next item a user will interact with based on their historical sequence of interactions. The main challenge in SR is to capture both short-term and long-term dependencies among items within a sequence. Self-Attentive Sequential Recommendation (SASRec) is a self-attention-based deep learning model designed to recognize sequential interaction patterns. Despite its effectiveness, the performance of SASRec is highly dependent on hyperparameter configurations, yet comprehensive evaluations remain limited. This research aims to evaluate the influence of SASRec's configuration through hyperparameter tuning on sequential recommendation performance. The hyperparameters used are hidden_size, inner_size, number of attention heads (num_heads), and number of layers (num_layers). The evaluation was conducted on two public datasets with different sparsity characteristics: MovieLens-1M (Sparsity ≈ 95.80%) and Amazon Musical Instruments (Sparsity ≈ 99.99%). In this study, Recall@k and MRR@k were used as performance metrics. The test results showed that hidden_size and inner_size had a significant positive impact on performance, especially on the dense dataset. The optimal hidden_size was obtained at hidden_size = 64 on the Amazon Musical Instrument dataset, and at hidden_size = 256 on the Movielens 1M dataset. The optimal inner_size was obtained at inner_size = 256 on both datasets. Meanwhile, the num_heads and num_layers hyperparameters did not provide a significant performance improvement. Furthermore, in the comparison between SASRec, GRU4Rec, and BERT4Rec, SASRec outperforms GRU4Rec and BERT4Rec in handling highly sparse datasets such as Amazon Musical Instruments obtained average recall@20 = 0.0678, and average MRR@20 = 0.0223.
Co-Authors Abbas, Ridha Mufidha Abdullah, Jainudin Abdullah, Salma Achmad, Abd. Kasim Ade Romadhony Adnan, Muh. Agung Toto Wibowo Ahmad, Nur Annida Ahsan Akbardin, Muh. Akib, Ridha Nurul Fitri Akil Musi, Muhammad Alfonso, Poserattu V. Alim, Khairun Muqtadira Ambo Dalle Ampauleng, Ampauleng Angel Merlyn Pattimahu Angreany, Femmy Anto, Ahmad Anwar Anwar Aponno, Chrestiana - Arief Fiddienika Arifani, Arifani Asrifan, Andi Ayu, Imelda Ratih Bachtiar, Fauziah Birahy, Denita Cornelis, Yuspico D., Dahri de Fretes, Marissa Falyn Desy Arum Sunarta Devilia, Kaila Djumat, Irwan Donni Richasdy Ernawati Ernawati Fatimah Sialana Fatkhul Ulum Fitriana Fitriana Gazali, Agus Umar Halim, Ardiansyah Hani Nurrahmi Hanum, Irma Surayya Haraty, Syamsul Razak Harla, Muh. Chaezar Fachreza Herlina Herlina Hutasoit, Mario Delfiero I Ilyas Idris, Rafli Ilham Arvan Junaidi Ilhamuddin Ilhamuddin, Ilhamuddin Irawati Irawati Irawati Irawati Isnaeni Isnaeni Janna, Mivtahul Jufri Jufri JULIARNI JULIARNI Jumriani, Jumriani Juneferstina, Maria Kahman, Hisma Kaledar, Amri Kallabe, Amirah Kassymova, Gulzhaina K Khaerunnisa, Nur Azizah Kriekhoff , Shella Lamasano, Mufidah Faradillah Lies Permana Luh Putu Ratna Sundari Maharani, Andi Nur Mahmud, Siti Nurhalisah Maksura, Ainul . Mannahali, Misnah Mappa Maggau, Fahrizal Maria Ulfa Maria, Enung Marwil, Andi Nurhabibi Marzuki, Kartini Maulana S, Nurfadilah Meillano, Zico Fachreza Mesrah, Mesrah Muh Iqbal Muhammad Anwar Muhammad Aras Muhammad Aras Muhammad Sulaiman Muhammad Sulaiman Muhammad Yusri Bachtiar, Muhammad Yusri Muhammad, Syahril Muhammadin, Akhmad Muhlis, Rosita Muhsin, Syamsiah Muzaini, Muhammad Noerismayanti, Noerismayanti Novianti, Dian Nurhanisa, Nurhanisa Nursyamsiah, Nursyamsiah Parwoto, Parwoto R. Usia, Tri Enadha R., Mantasiah Rahmatullah, Kukuh Rajaloa, Nani Rajaloa, Nani I. Ramadhani, Syamsinar Rifdian, Filandia Riski Apriliani Riupassa, Elisabeth S, Hamzah. S, Kurniawati Saharuddin, Nugrawan Sahib, Nur Hafifah Salle, Ilham Z Salsabila, Imtitsal Ulya Samsir, Nurul Fajriani Seng, Tirai Sergie, Misrina Setiawan, Muhammad Rizki Ramadhan Siahaya, Septina Louisa Sijid, St. Aisyah Sitti Muthmainnah Siwabessy, Fajarina Sjahruddin, Herman Solly Aryza Srimularahmah, Andi Sua, Andi Tenri Sultan, Jumriani Sunarding, Sunarding Syamsu Rijal Syamsuardi Syamsuardi Syamsuddin, Muhammad Bachtiar Syaputra, Arlian Fachrul Tangke, Diar Muzna Tanihatu, Arthur R. Tresna Ariesta, Bayu Tri Sugiarti, Tri Tumbelaka, Aling Sadewai U Usman Udin, Hamdan Usman Usman Usmany, Rendy Usmayani, Ilham Putra Wahab, Mufita Wahyudin Noe, Wahyudin Winarti Winarti Wiranto, Agus Yesaya, Mey C Yudistira Yudistira Yusri Yusri Yusuf, Mukhtar Zakariah, M. Askari