OK, so my numbers for "Read all 100000 records using 4 threads" were really

" Read ", $R * 100 / $N, " % of all records using 4 threads"

that means the test was doing 0.1 % of what the output-line was saying.

Here is a run without that mistake:

#  The offending code line changed to:
#  $Q->nq( $_ ) for (shuffle 1 .. $N);

SQLite -   5.90120077 s  - Populate db with 100000 rows
SQLite -   0.15266800 s  - Create primary index
SQLite -   0.53022408 s  - Read all 100000 rows, unthreaded
SQLite -   7.23427510 s  - Read all 100000 rows, 4 threads

    Pg -  23.40106297 s  - Populate db with 100000 rows
    Pg -   0.53076911 s  - Create primary index
    Pg -  13.71553111 s  - Read all 100000 rows, unthreaded
    Pg -   7.40499115 s  - Read all 100000 rows, 4 threads
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