support for mailbox limit;

tuned signature;

discontinued pointless option (reverting 63d55ba90a9f): performance tuning works better via SQL.Database.execute_batch_statement;

clarified database transactions (see also 2c704ae04db1, 7bd0a250183b);

afford multiple tests on fast machines (see also edb4faf666c9 and 2a26d423d9fb); proper history_base for ARM;

performance tuning: parallel and incremental update of build_log_database;

performance tuning: more careful database access;

clarified message;

tuned signature;

tuned;

prefer old-style import "=>";

merged

redundant (see also 3069da1743bc);

removed obsolete table (see also 6acd1a2bd146);

more robust init_database(); proper treatment of views, not tables (amending dd350a41594c);

proper private_data.transaction_lock; prefer execute_batch_statement;

clarified names;

proper support for SSH;

tuned signature;

tuned imports;

add module for faster scheduled builds;

always use host database and make protected;

read relative cpu from build log;

prefer extensible next_node_info in build process over process_options in build engine (which needs the final node info anyway);

added start date to build jobs, e.g., for build time estimation;

added initial version of benchmark module, e.g., to compare performance of different hosts; added benchmark operation to build cluster;

generalized node infos: allow addressing of numa node segments via relative cpus; add more node options and process policy options using taskset as alternative to NUMA for more fine-grained cpu controls (e.g., for cpus with heterogeneous cores in the same NUMA segment);

add information about static host resources such as available NUMA nodes, cpus, etc. (e.g., for offline build planning);