In mid 2000s, you usually must download the whole package first, then you can install it. But now, installer like chrome, steam, can download and install at the same time. How does it work?
In: Technology
Simple old-style installers would basically be a fancy ZIP archive that could copy files to multiple locations and make a few modifications to system files. That’s right, the entire program was contained within the install.exe in compressed form. So, you would have to download the entire thing before beginning the install process.
Modern installers replace the ZIP-archive-like part with commands to download files directly from the developer’s server, allowing the install.exe to be much smaller so that you can begin the process sooner.
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