size: 3888MiB
Yeah, it is pretty much expected that it is super sluggish.
You need 4GB RAM minimum, highly recommended to have 8+ GB.
product: Intel(R) Celeron(R) 2955U @ 1.40GHz
Is that 2 cores? Also not surprising at all that it is super slow.
…
A screenshot, srsly? 
But you are likely using some memory-heavy module, and since there is no RAM, it processes the image in tiles, which is super slow.
EDIT: so it is demosaic. A surprize, i thought it would be basecurve (exposure fusion)/local contrast/equalizer/profiled denoise.
So which demosaicing mode are you using?
You likely want to kill all the other apps when running dt, and play with “host memory limit (in MB) for tiling” and “minimum amount of memory (in MB) for a single buffer in tiling” and “do high quality resampling during export” params, see https://www.darktable.org/usermanual/en/core_options.html