I recently switched from gcp to railway due to cloud sql costs. Still trying out railway with the free plan and it's been great.

I moved both my app and database(postgres)

Recently I tried to access an endpoint that requires me to download a zip file of 2.55MB and I am seeing download time of more than 2 minutes. Like cloud run was instant for the same endpoint.

Zip is generated on the server and sent back to client.

After doing some research, there are suggestions that the issue may be due to the limits in free plan but I doubt this. I currently still have about 4$ credits left and inspecting dashboard, there appears not to be any maxing out of limits.

I plan to upgrade but need to be sure everything would work fine after upgrade

Here is a snippet of the download code

const downloadComplete = new Promise((resolve, reject) => {
                res.download(zipPath!, 'content.zip', (err) => {
                    if (err) reject(err);
                    else resolve({});
                });
            });

This is a res.download issue as other response types like res.send or res.json works well.