Refactor cache

[diondokter]

Based on my idea in #99

Closes #99
Fixes #94

[github-actions]

PR build size

  text	   data	    bss	    dec	    hex	filename
 17196	     56	   1720	  18972	   4a1c	example

Diff

    FILE SIZE        VM SIZE    
 --------------  -------------- 
  -6.5%      -3  [ = ]       0    [Unmapped]
  -0.0%     -79  [ = ]       0    .debug_info
  -0.0%    -122  [ = ]       0    .debug_str
  -0.0%    -204  [ = ]       0    TOTAL

[github-actions]

PR build size

  text	   data	    bss	    dec	    hex	filename
 20396	     56	   1816	  22268	   56fc	example

Diff

    FILE SIZE        VM SIZE    
 --------------  -------------- 
  +6.1% +31.2Ki  [ = ]       0    .debug_str
  +4.6% +22.7Ki  [ = ]       0    .debug_info
  +1.7% +4.50Ki  [ = ]       0    .debug_loc
  +2.6% +3.22Ki  [ = ]       0    .debug_line
   +19% +3.12Ki   +19% +3.12Ki    .text
  +4.8% +2.95Ki  [ = ]       0    .debug_ranges
   +13% +2.63Ki  [ = ]       0    .strtab
   +17% +1.20Ki  [ = ]       0    .symtab
  +1.5%    +696  [ = ]       0    .debug_frame
  +1.2%    +248  [ = ]       0    .debug_aranges
  +2.2%    +101  [ = ]       0    .debug_abbrev
  [ = ]       0   +14%     +96    .bss
  +4.6% +72.5Ki   +17% +3.22Ki    TOTAL

[github-actions]

PR build size

  text	   data	    bss	    dec	    hex	filename
 20396	     56	   1816	  22268	   56fc	example

Diff

    FILE SIZE        VM SIZE    
 --------------  -------------- 
  +6.8% +34.9Ki  [ = ]       0    .debug_str
  +4.6% +22.7Ki  [ = ]       0    .debug_info
  +1.7% +4.50Ki  [ = ]       0    .debug_loc
  +2.6% +3.26Ki  [ = ]       0    .debug_line
   +19% +3.12Ki   +19% +3.12Ki    .text
   +15% +3.05Ki  [ = ]       0    .strtab
  +4.8% +2.95Ki  [ = ]       0    .debug_ranges
   +17% +1.20Ki  [ = ]       0    .symtab
  +1.5%    +696  [ = ]       0    .debug_frame
  +1.2%    +248  [ = ]       0    .debug_aranges
  +2.2%    +101  [ = ]       0    .debug_abbrev
  [ = ]       0   +14%     +96    .bss
 -13.0%      -6  [ = ]       0    [Unmapped]
  +4.9% +76.7Ki   +17% +3.22Ki    TOTAL

[github-actions]

PR build size

  text	   data	    bss	    dec	    hex	filename
 20396	     56	   1816	  22268	   56fc	example

Diff

    FILE SIZE        VM SIZE    
 --------------  -------------- 
  +6.8% +34.9Ki  [ = ]       0    .debug_str
  +4.6% +22.7Ki  [ = ]       0    .debug_info
  +1.7% +4.50Ki  [ = ]       0    .debug_loc
  +2.6% +3.26Ki  [ = ]       0    .debug_line
   +19% +3.12Ki   +19% +3.12Ki    .text
   +15% +3.05Ki  [ = ]       0    .strtab
  +4.8% +2.95Ki  [ = ]       0    .debug_ranges
   +17% +1.20Ki  [ = ]       0    .symtab
  +1.5%    +696  [ = ]       0    .debug_frame
  +1.2%    +248  [ = ]       0    .debug_aranges
  +2.2%    +101  [ = ]       0    .debug_abbrev
  [ = ]       0   +14%     +96    .bss
 -13.0%      -6  [ = ]       0    [Unmapped]
  +4.9% +76.7Ki   +17% +3.22Ki    TOTAL

[github-actions]

PR build size

  text	   data	    bss	    dec	    hex	filename
 20396	     56	   1816	  22268	   56fc	example

Diff

    FILE SIZE        VM SIZE    
 --------------  -------------- 
  +6.8% +34.9Ki  [ = ]       0    .debug_str
  +4.6% +22.7Ki  [ = ]       0    .debug_info
  +1.7% +4.50Ki  [ = ]       0    .debug_loc
  +2.6% +3.26Ki  [ = ]       0    .debug_line
   +19% +3.12Ki   +19% +3.12Ki    .text
   +15% +3.05Ki  [ = ]       0    .strtab
  +4.8% +2.95Ki  [ = ]       0    .debug_ranges
   +17% +1.20Ki  [ = ]       0    .symtab
  +1.5%    +696  [ = ]       0    .debug_frame
  +1.2%    +248  [ = ]       0    .debug_aranges
  +2.2%    +101  [ = ]       0    .debug_abbrev
  [ = ]       0   +14%     +96    .bss
 -13.0%      -6  [ = ]       0    [Unmapped]
  +4.9% +76.7Ki   +17% +3.22Ki    TOTAL