"A committed performance".
I can well imagine that is code. What exactly is it code for? Stodgy and dull?
It's usually a case of "damning with faint praise", I think

Little else could be said of the performance (viz playing the right notes etc) other than the performer was committed to giving it

And here is the original context of reiner's quotation from Alexander Pope's Epistle to Dr Arbuthnot:
"Peace to all such! but were there one whose fires
True Genius kindles, and fair fame inspires,
Blest with each talent and each art to please, [195]
And born to write, converse, and live with ease:
Should such a man, too fond to rule alone,
Bear, like the Turk, no brother near the throne,
View him with scornful, yet with jealous eyes,
And hate for arts that caus'd himself to rise; [200]
Damn with faint praise, assent with civil leer,
And without sneering, teach the rest to sneer;
Willing to wound, and yet afraid to strike,
Just hint a fault, and hesitate dislike;
Alike reserv'd to blame, or to commend, [205]
A tim'rous foe, and a suspicious friend;
Dreading ev'n fools, by flatterers besieg'd,
And so obliging, that he ne'er oblig'd;
Like Cato, give his little Senate laws,
And sit attentive to his own applause; [210]
While Wits and Templers ev'ry sentence raise,
And wonder with a foolish face of praise.
Who but must laugh, if such a man there be?
Who would not weep, if Atticus were he?"
Atticus was meant to refer to the influential critic, Joseph Addison.
"Obliged" is pronounced "obleeged".