do not load sagenb.misc.misc on startup

[saraedum]

Not loading sagenb.misc.misc on normal sage startup speeds up sage startup:

$ dumbbench -- ./sage --startuptime
Ran 25 iterations (4 outliers).
Rounded run time per iteration: 9.80e-01 +/- 1.3e-02 (1.3%)

vs.

dumbbench -- ./sage --startuptime
Ran 21 iterations (1 outliers).
Rounded run time per iteration: 9.38e-01 +/- 1.5e-02 (1.6%)

---

Apply:

1. attachment: trac_11733_sagenb_misc_misc_sage.patch to the Sage library.
2. attachment: trac_11733_sagenb_misc_misc_sagenb.patch to the SageNB repository.

Depends on #11732

Component: notebook

Keywords: sd32

Reviewer: Julian Rueth

Issue created by migration from https://trac.sagemath.org/ticket/11733

[saraedum]

Attachment: trac_11733_sagenb_misc_misc_sage.patch.gz

[saraedum]

comment:1

Attachment: trac_11733_sagenb_misc_misc_sagenb.patch.gz

[saraedum]

Changed author from Julian Rüth to Julian Rueth

[williamstein]

Changed keywords from none to sd32

[robertwb]

comment:4

Looks good. Wish it were a bigger spedup, but ever 1-2% counts (it's like compound interest ;-)