rewritten of asdf.

1. Remora

2. Remora

3. Remora
asdf

4. Remora
is
faster
lightweight
asdf

5. Bench asdf vs remora
to load hunchentoot on ccl.
Asdf
● 36.464 sec
● 313,210,864 bytes of
memory allocated.
Remora
● 29.572 sec
● 304,207,024 bytes of
memory allocated.

6. What asdf/remora doing.
asdf
● Search asd file.
● Load asd file.
● Make asdf:system.
● Planning.
● Do tasks.
remora
● Search asd file.
● Read from asd file.
● Make remora:system.
● Planning.
● Do tasks.

7. Asdf vs Remora
How many slots
Asdf
● 34
Remora
● 7

8. Asdf vs remora
total code lines
Asdf
● 4887
Remora
● 794

9. Structure vs Class
Cost of making one slot instance
Structure
● 4,057 processor
cycles (on sbcl)
● 16 bytes of memory
allocated (on ccl)
Class
● 46,127,284 processor
cycles (on sbcl)
● 328 bytes of memory
allocated (on ccl)

10. Planning.
Asdf
● Using plan class
object.
● Depth first strategy(?)
Remora
● Using list as graph.
● Topological sort.

11. tsort.
● ((babel . (trivial-features alexandria))
(trivial-features . ())
(alexandria . ()))
↓
● ((trivial-features alexandria)(babel))

12. Tasks.
● Compile if needed.
● Load if needed.

13. Meaning of 'if needed'.
Compile
● Still not compiled.
● Source file newer than
fasl cache.
● Source file which
depends on was
modified.
● Dependent system
newer than system.
Load
● Still not loaded.
● File re/compiled.

14. Heavy tasks
● Compiling file.
● Getting file time stamp.
● Making directory.
● Printing to stream.

15. Bench asdf vs remora again
to load hunchentoot on ccl.
Asdf
● 36.464 sec
● 313,210,864 bytes of
memory allocated.
Remora with parallel
● 12.257 sec
● 2,952,899,360 bytes
of memory allocated.